Posted by Anonymous on .
if y=(x +3)2, then (2x6)2 must equal which of the following:
a) 4y2
b) 2y2
c) 4y
d) 4y

Maths 
Rivaille,
given: y =(x + 3)^2
(2x  6)^2
((2)(x+3))^2
distribute the exponent:
(2)^2 * (x+3)^2
substitute y:
4 * y
which is letter D.