f(x) = x^2-2x
f(x+3) = (x+3)^2 - 2(x+3)
= x^2+6x+9 -2x -6
= x^2 + 4x + 3
f(x) = x^2 - 2x
f(x + 3) = (x + 3)^2 - 2(x + 3)
f(x + 3) = x^2 + 6x + 9 - 2x - 6
f(x + 3) = x^2 + 4x + 3 (B)
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f(x) = x^2-2x
f(x+3) = (x+3)^2 - 2(x+3)
= x^2+6x+9 -2x -6
= x^2 + 4x + 3
f(x) = x^2 - 2x
f(x + 3) = (x + 3)^2 - 2(x + 3)
f(x + 3) = x^2 + 6x + 9 - 2x - 6
f(x + 3) = x^2 + 4x + 3 (B)