4(2 + x)2 + 8(2 + x) - 9
4(4 + 4x + x2) + 16 + 8x - 9
16 + 16x + 4x2 + 16 + 8x - 9
4x2 + 24x + 23
Lily D.
asked 03/06/19If ƒ(x) = 4x2 + 8x – 9, find and simplify ƒ(2 + x)
4(2 + x)2 + 8(2 + x) - 9
4(4 + 4x + x2) + 16 + 8x - 9
16 + 16x + 4x2 + 16 + 8x - 9
4x2 + 24x + 23
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