# Maths

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if y=(x +3)2, then (-2x-6)2 must equal which of the following:
a) -4y2
b) -2y2
c) -4y
d) 4y

• Maths -

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.

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