SOLUTION: 12ab - 30b + 4a^2 - 25b^2 This question must be factorised: I have tried 4a(3+a) -5b(6+5b)but I think it may be incorrect. Thankyou!

SOLUTION: 12ab - 30b + 4a^2 - 25b^2 This question must be factorised: I have tried 4a(3+a) -5b(6+5b)but I think it may be incorrect. Thankyou!

Algebra.Com

Question 586029: 12ab - 30b + 4a^2 - 25b^2
This question must be factorised: I have tried 4a(3+a) -5b(6+5b)but I think it may be incorrect.
Thankyou!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

12ab - 30b + 4a^2 - 25b^2

(12ab - 30b) + (4a^2 - 25b^2)

6b(2a - 5) + (4a^2 - 25b^2)

6b(2a - 5) + (2a-5b)(2a+5b)

and this is as far as you can go. Make sure that there are no typos.
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