Identify Quadratic Equation: Identify the quadratic equation to be factored.The given quadratic equation is x2−13x+40.We need to find two numbers that multiply to give the constant term (40) and add up to give the coefficient of the linear term (−13).
Find Multiplying Numbers: Find two numbers that multiply to 40 and add up to −13. The numbers that satisfy these conditions are −8 and −5 because (−8)×(−5)=40 and (−8)+(−5)=−13.
Write Factored Form: Write the quadratic equation in its factored form using the two numbers found in Step 2.The factored form of the quadratic equation is (x−8)(x−5).
Check Factored Form: Check the factored form by expanding it to ensure it matches the original quadratic equation.Expanding (x−8)(x−5) gives x2−5x−8x+40, which simplifies to x2−13x+40.This matches the original quadratic equation, so the factoring is correct.
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