Identify Coefficients: Step Title: Identify the CoefficientsReasoning: Identify the coefficients of the quadratic equation, which are the numbers in front of the variables. In this case, the coefficients are 15, 4, and −4.Calculation: Coefficients are 15, 4, −4
Find Factors: Step Title: Find the FactorsReasoning: Find two numbers that multiply to −60(15×−4) and add to 4 (the coefficient of the middle term).Calculation: Factors of −60 that add up to 4 are 10 and −6.
Write Factored Form: Step Title: Write the Factored FormReasoning: Write the factored form of the quadratic equation using the factors found in the previous step.Calculation: The factored form is (15b−6)(b+10).