Question

If x2 = 30, what is the value of x? A. ±60 B. ±15 C. ±square root of 30 D.±square root of 15

Answer 1

Answer:

  C.  ±square root of 30

Step-by-step explanation:

Apply the square root function to both sides of the equation:

  $\sqrt{x^2}=\sqrt{30}\\\\|x|=\sqrt{30}\\\\x=\pm\sqrt{30}$

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The absolute value equation has two solutions. They match choice C.