Identify Coefficients: Step Title: Identify the CoefficientsConcise Step Description: Identify the coefficients of the quadratic equation, which are the numbers in front of the variables. In this case, the coefficients are 2, 1, and −21.Step Calculation: Coefficients are 2, 1, −21Step Output: Coefficients: 2, 1, −21
Find Factors: Step Title: Find the FactorsConcise Step Description: Find two numbers that multiply to the product of the first and last coefficients 2×−21=−42 and add to the middle coefficient 1.Step Calculation: Factors of −42 that add up to 1 are 7 and −6 (because 7×−6=−42 and 7+(−6)=1).Step Output: Factors: 7, −6
Rewrite Middle Term: Step Title: Rewrite the Middle TermConcise Step Description: Rewrite the middle term using the factors found in the previous step.Step Calculation: The quadratic equation can be rewritten as 2x2+7x−6x−21.Step Output: Rewritten Quadratic: 2x2+7x−6x−21
Factor by Grouping: Step Title: Factor by GroupingConcise Step Description: Group the terms into two pairs and factor out the common factors from each pair.Step Calculation: Group (2x2+7x) and (−6x−21), then factor out the common factors. From the first group, we can factor out x, and from the second group, we can factor out −3.Step Output: Factored Groups: x(2x+7)−3(2x+7)
Factor Out Common Binomial: Step Title: Factor Out the Common BinomialConcise Step Description: Factor out the common binomial from the two groups.Step Calculation: The common binomial is (2x+7), so we factor it out to get the final factored form.Step Output: Factored Form: (x−3)(2x+7)