KilerQuinn
KilerQuinn KilerQuinn
  • 12-11-2016
  • Mathematics
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What is the value of z so that -9 and 9 are both solutions of x^2+z=103?
a.-22
b.3
c.22
d.184

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Kudzzzz Kudzzzz
  • 12-11-2016
The answer is C.
x^2 + z = 103x^2 + 22 = 103*Subtract both sides by 22*x^2 + 22 - 22 = 103 - 22x^2 = 81*square root both sides to find x*√x^2 = √81
x = +- 9
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