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If x squared equals n, then x is the square root of n.
x=9 squared
(x + 7)2 = 5 x + 7 = ±√5 x + 7 - 7 = -7 ± √5 x = -7 ± √5
x-10=15 Add 10 to both sides x=25
X squared = x+6 6+x=x squared X=6