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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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