Mathematics
boom2
9

how do I solve x^2-9=0

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(2) Answers
Freddy155

You make x^2 equal 9 so you subtract and get zero. In this case, x = 3 because 3 times itself is 9 and 9-9 =0

nikolak

x² - 9 = 0 x² + 3x - 3x - 9 = 0 (x - 3)(x + 3) = 0 x - 3 = 0  or  x + 3 = 0   + 3 + 3           - 3  - 3      x = 3              x = -3

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