Question

factorise 9a^2+3a-8b-64b^2

Answer 1

hay!!

Dear friend -

Factorise 9a²+3a-8b -64b²

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You know how we do factorise hear we look first any common if we can't get any common then we check hear any equations like any formula hear we get a equation 9a²-64b² it's like a²-b²

Then,

we put it value in given formula

=> 9a²+3a-8b-64b²

=> 9a²-64b²+3a-8b

=> (3a)²-(8b)²+3a-8b

=> (3a-8b) (3a+8b)+ (3a-8b)

Hear we found a common if we let it we get our answer

=> 3a-8b ( 3a+8b+1)

I hope it's help you

Answer 2

9a² +3a - 8b - 64b²

=9a² - 64b² + 3a - 8b

= {(3a) ² - (8b) ²} + (3a-8b)

= (3a +8b)(3a - 8b) + (3a - 8b)

= (3a - 8b)(3a +8b +1)__answer__
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Hope this is ur required answer
Proud to help you