Question

Factor 4x^2 – 81y^2.

Answer 1

keep this identity in your mind
\[\huge (a-b)(a+b)=a^2-b^2\]

now let \(a=2x\) and \(b=9y\) to get ur answer

Answer 2

you might need to help me a bit further i dont quite understand

Answer 3

@mukushla please

Answer 4

note that \(4x^2 – 81y^2=(2x)^2-(9y)^2\)

Answer 5

thank u!

Answer 6

yw :)