Rewrite the quadratic function in standard form by completing the square.f(x) = x2 + 20x
A. f(x) = (x - 20)2 + 20
B. f(x) = (x + 10)2 - 100
C. f(x) = (x - 10)2 + 10
D. f(x) = (x + 20)2 - 400
Answer: B
Mathematics
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