KilerQuinn KilerQuinn

11-11-2016
Mathematics

Answered

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

Verified Answer :

Kudzzzz Kudzzzz

11-11-2016

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

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