I need help with factorising the following:

a) (c+d)^2 - d^2

I got c^2 + 2cd + d^2 - d^2 which is equal to c^2 + 2cd, is this correct please?

b) 2w^2 + w - 3

How do you do this again please (need simple and clear advice)? Thanks

Printable View

- Feb 5th 2011, 09:03 AMNatasha1Factorising a quadratic
I need help with factorising the following:

a) (c+d)^2 - d^2

I got c^2 + 2cd + d^2 - d^2 which is equal to c^2 + 2cd, is this correct please?

b) 2w^2 + w - 3

How do you do this again please (need simple and clear advice)? Thanks - Feb 5th 2011, 09:14 AMTheEmptySet
- Feb 5th 2011, 09:25 AMArchie Meade
- Feb 5th 2011, 10:25 AMskoker
here is how i did the first equation. is a positive perfect square.

expand perfect square.

collect d squared terms they cancel.

factor out c.