Factorise

a) 49 - r²

b) 10x² - x - 3

c) 2x² - 50

Moderator edit:Rule #8 enforced: http://www.mathhelpforum.com/math-he...hp?do=vsarules

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- Apr 25th 2011, 07:23 PMzeeeebraaaaFactorise.
Factorise

a) 49 - r²

b) 10x² - x - 3

c) 2x² - 50

**Moderator edit:**Rule #8 enforced: http://www.mathhelpforum.com/math-he...hp?do=vsarules - Apr 25th 2011, 07:25 PMProve It
What have you tried?

- Apr 26th 2011, 01:30 AMzeeeebraaaa
ya i tired dint manage to get the answer

- Apr 26th 2011, 02:18 AMProve It
- Apr 26th 2011, 04:07 AMe^(i*pi)
You'll be using the difference of two squares for 1 and 3