Hi

Please help.

Thank you

Secondary Two Maths.

Factorise

1) -6x^2 + x + 1

2) -5x^2 + 63x - 36

## Search found 40 matches

- Fri Jul 22, 2011 8:36 pm
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

- Thu Jun 30, 2011 7:21 pm
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

### Re: Secondary School Mathematics

Sec Two Maths

Expand and simplify

(3x+7y)^2 – (-2x-3)^2

(^2 means to the power of 2)

Please help.

Thank you.

Expand and simplify

(3x+7y)^2 – (-2x-3)^2

(^2 means to the power of 2)

Please help.

Thank you.

- Sun Jun 26, 2011 10:05 pm
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

### Re: Secondary School Mathematics

Hi

Is there a difference between simplification and factorisation of algebraic expressions?

Please help.

Thank you.

Is there a difference between simplification and factorisation of algebraic expressions?

Please help.

Thank you.

- Wed Jun 22, 2011 8:26 pm
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

### Re: Secondary School Mathematics

HiFrekiWang wrote: 5z^2-30z=5(z^2-6z)=5(z^2-6z+9-9)=5(z^2-6z+9)-45=5(z-3)^2-45

Please explain in more details how you get this.

5z^2-30z=5(z^2-6z)=5(z^2-6z+9-9)=5(z^2-6z+9)-45=5(z-3)^2-45

Thank you

- Wed Jun 22, 2011 4:41 pm
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

### Re: Secondary School Mathematics

Sec Two Maths

Find the smallest possible value of the expression 3x^2 + 27y^2+5z^2-18xy-30z+125.

Note a) ^2 means to the power of 2

Please help.

Thank you

Find the smallest possible value of the expression 3x^2 + 27y^2+5z^2-18xy-30z+125.

Note a) ^2 means to the power of 2

Please help.

Thank you

- Wed Jun 22, 2011 8:33 am
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

### Re: Secondary School Mathematics

Sec Two Maths

1) Given that x^2 = 5x – 1, find the value of 2x^4 + 2/x^4

2) a)Factorise 2x^10 – 13x^5 -15 completely.

b)Factorise 10x^10y – 65x^5y-75y

Note a) ^2 means to the power of 2 b) 2/x^4 means 2 divided by x^4

Please help.

Thank you

1) Given that x^2 = 5x – 1, find the value of 2x^4 + 2/x^4

2) a)Factorise 2x^10 – 13x^5 -15 completely.

b)Factorise 10x^10y – 65x^5y-75y

Note a) ^2 means to the power of 2 b) 2/x^4 means 2 divided by x^4

Please help.

Thank you

- Sat Jun 18, 2011 10:47 am
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

### Re: Secondary School Mathematics

Secondary Two Maths

Hi

Solve this equation

(x-2)^2 = 3(2x-3)(2-x)

(x-2)^2 means (x-2) to the power of 2.

Please help.

Thank you.

Hi

Solve this equation

(x-2)^2 = 3(2x-3)(2-x)

(x-2)^2 means (x-2) to the power of 2.

Please help.

Thank you.

- Sat May 01, 2010 12:59 pm
- Forum: Secondary Schools - Academic Support
- Topic: O-Level Additional Math
- Replies:
**1806** - Views:
**347187**

Hi Teacher Guan Hui Please help. 1)Mrs Lee has 2 daughters,Alice and Judy.The highest common factor and lowest common multiple of their ages are 3 and 168 respectively.If Alice is 3 years older than her sister, find her age. 2)The HCF and LCM of 270 and A are 18 and 5940 respectively. What is the va...

- Thu Feb 04, 2010 8:08 am
- Forum: Primary 6 & PSLE
- Topic: Q&A - PSLE Science
- Replies:
**4292** - Views:
**978288**

I have a question. Why do farmers cut off the leaves of the radish before selling them? Thanks The food stored in the radish may be utilised by the radish to grow into a young plant and the radish will shrink in size. Hi The food stored in the radish may be utilised by the radish to grow into a you...

- Fri Nov 06, 2009 2:32 pm
- Forum: Primary Schools - Academic Support
- Topic: Tutor MathsGuru: Ask me for your burning Maths questions!
- Replies:
**4376** - Views:
**769530**

Thank you for your help. Simon has some money. He spends $10 on 3 exercise books and 7 pencils. He will be short of $0.40 if he were to buy another exercise book. He will have $0.60 left if he were to buy one more pencil. (a) How much does each exercise book cost? (b) How much money does Simon have?