Factor x^2-2x-80
Problem
Solution
Identify the coefficients of the quadratic expression in the form
a*x2+b*x+c wherea=1 b=−2 andc=−80 Find two numbers that multiply to the constant term
c=−80 and add to the linear coefficientb=−2 Determine the pair of factors by testing pairs of numbers that multiply to
−80 8×−10=−80 and8 + (-10) = -2$.Write the expression in factored form
(x+p)*(x+q) using the numbers found in the previous step.
Final Answer
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