Question 623380
(x-9) (x-9)= x2-81
-how did you find the factors of x2-81?
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Use ^ for exponents, shifted 6.
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(x-9)*(x-9) is not x^2-81
{{{(x-9)*(x-9) = x^2 - 18x + 81}}}
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{{{x^2-81 = (x-9)*(x+9)}}}