Which of the following are solutions to the equation below? Check all that apply . x ^ 2 + x – 20 = 0

Question

Which of the following are solutions to the equation below? Check all that apply . x ^ 2 + x – 20 = 0

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Cora 1 week 2021-10-10T00:50:28+00:00 1 Answer 0

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    2021-10-10T00:52:08+00:00

    Answer:

    x= -5     or    x  =  4

    Solution Set = {-5, 4}

    Step-by-step explanation:

    x^{2} + x -20 = 0

    x^{2} + 5x - 4x -20  = 0

    (x^{2} + 5x) - (4x + 20)  = 0

    x(x + 5) - 4(x + 5)  =  0

    (x + 5)(x - 4)  = 0

    x+ 5= 0     or    x - 4 = 0

    x= -5     or    x  =  4

    Solution Set = {-5, 4}

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