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6 October, 13:50

What are the solutions to the equation √x2+2x-10=√x+20

A. x = - 6, x = - 5

B. x = - 6, x = 5

C. x = - 5, x = 6

D. x = 5, x = 6

Answer Is B

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Answers (1)
  1. 6 October, 14:19
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    √x^2+2x-10=√x+20

    raising both members to the square

    x^2+2x-10=x+20

    rewriting

    x^2+x-30=0

    factoring

    (x+6) (x-5) = 0

    therefore the solutions are

    x = - 6, x = 5

    the answer is

    B. x = - 6, x = 5
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