Question

factorise answar 20a^2-45b^2

Answer 1

Here is your Answer,

By Using identity ,

a²-b²= ( a+b)(a-b)

Given , = 20a²-45b²

It can be written as ,
= (2√5a)²-(3√5b)²

Here a= (2√5a)
b= (3√5b)

= (2√5a - 3√5b)(2√5a +3√5b)

Hope this helps you....✌^_^

Answer 2

HEYA MATE ,HERE IS UR ANSWER ____________________________

20a^2-45b^2
= (2root5a)^2-(3root5b)^2
using identity a^2-b^2=(a+b)(a-b)
= (2root5a+3root5b)(2root5a-3root5b)


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