Consider the quadratic function: f (x) = 5×2 + 20x + 20. What are the zeros of the function using completing the square?

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Consider the quadratic function: f (x) = 5×2 + 20x + 20. What are the zeros of the function using completing the square?

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Kiệt Gia 2 months 2021-07-21T17:01:52+00:00 1 Answers 2 views 0

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    2021-07-21T17:03:20+00:00

    Step-by-step explanation:

    step 1. f(x) = 5x^2 + 20x + 20

    step 2. f(x) = 5(x^2 + 4x + 4)

    step 3. f(x) = 5(x + 2)^2

    step 4. 0 = 5(x + 2)^2

    step 5. zeros: -2

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )