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OpenStudy (anonymous):
Solve (x+9)^2 -7=0 Express radicals in simplest form.
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OpenStudy (blurbendy):
what is (x+9)(x+9) ?
OpenStudy (anonymous):
x^2+18x+81
OpenStudy (blurbendy):
so you have x^2 + 18x + 81 - 7 = 0 x^2 + 18x -74 = 0 can you factor this quadratic?
OpenStudy (anonymous):
keep trying to see if I can factor, but I don't think so
OpenStudy (blurbendy):
yeah, so that means we need to use the quadratic formula
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