Question

FACTORISE 4(2x-5)*2-9(y+1)*2
plzzz do it its urgent​

Answer 1

$4(2x-5)^2 - 9(y+1)^2\\ \\ =[2(2x-5)]^2 - [3(y+1)]^2\\ \\ =(4x-10)^2 - (3y+3)^2\\ \\ =[(4x-10) + (3y+3) ] \times [(4x-10) - (3y+3) ]\\ \\ =[4x-10 + 3y+3 ] \times [4x-10 - 3y-3 ]\\ \\ =\boxed{\bold{(4x+3y-7)(4x-3y-13)}}$