Question

Factorize:
factorise :
(i) 9 x square minus 4( Y + 2 x )square (WITH EXPLANATION)

Answer 1

Step-by-step explanation:

you can see ax2 + 4y2 as (3 X) 2 + (2 Y) 2

given the formula of a2+ b2= (a +b)2

with a =3 and b=2 you have

2ab=(2.3.2) x y = 12 x y so you can add and subtract it to have

=(3x)2+ (2y)2 +12xy-12xy

={(3x)2+(2y)2+12xy}-12xy

=(3x+2y)-12xy