Question 269446
I need to factor and solve by using the principle of zero theory 
(x+3)(x-9)= -13 
Expand the left side:
x^2 -6x - 27 = -13
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Rearrange:
x^2 -6x -14 = 0
Quadratic formula:
x = [6 +- sqrt(36 - 4*-14)]/2
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x = [6 +- sqrt(92)]/2
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x = [6 +- 2sqrt(23)]/2
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x = 3 + sqrt(23) or x = 3 - sqrt(23)
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Cheers,
Stan H.