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anonymous

  • one year ago

What number should be added to both sides of the equation to complete the square? x2 + 8x = 4 A.4 B.8 C.16 D.32 What value of c makes x2 + 6x + c a perfect square trinomial? A.3 B.6 C.9 D.12

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  1. Haseeb96
    • one year ago
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    to make complete square we first need to find the last term of quadratic equation for which we will use this formula |dw:1436725323137:dw|

  2. anonymous
    • one year ago
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    ok

  3. Haseeb96
    • one year ago
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    @misssunshinexxoxo help her and check my work also. is that formula correct?

  4. misssunshinexxoxo
    • one year ago
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    Yes correct.

  5. mathstudent55
    • one year ago
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    In order to complete the square, you need to have a polynomial whose second-degree term (the \(x^2\)-term) has a coefficient of 1. In both your given problems, the \(x^2\) term is simply \(x^2\), so you do have the coefficient of 1 that you need. To find the term that completes the square, divide the coefficient of the x-term by 2, and then square it. In you first problem, the coefficient of the x-term is 8. Divide 8 by 2 and then square it. That is what needs to be added to complete the square. In your second problem, the x-term has a coefficient of 6. Divide 6 by 2, then square it. That is what needs to be added to complete the square.

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