Answer:
(x + 1/2)^2 = 289/4
Explanation:
x^2+x-72=0
Write like this:
(x + ___)^2 = ___
put 72 on other side
x^2 + x = 72
x^ + x + (1/4) = 72 + (1/4)
x + (1/2) = 17/2
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