5x^2-23=57

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5x^2-23=57

Guest Mar 17, 2015

+130514

+5

Best Answer

5x^2-23=57 add 23 to both sides

5x^2= 80 divide both sides by 5

x^2 = 16 take the positive and negative square root of both sides

x = ±√16 = ± 4

CPhill Mar 17, 2015

CPhill · Answer 1 · 2015-03-17T08:31:42

5x^2-23=57 add 23 to both sides

5x^2= 80 divide both sides by 5

x^2 = 16 take the positive and negative square root of both sides

x = ±√16 = ± 4