Q. Factor the quadratic expression completely.3x2−20x−7=
Identify Coefficients: Step Title: Identify the CoefficientsConcise Step Description: Identify the coefficients of the quadratic expression, which are the numbers in front of the variables. In this case, the coefficients are 3, −20, and −7.Step Calculation: Coefficients are 3, −20, −7Step Output: Coefficients: 3, −20, −7
Find Factors: Step Title: Find the FactorsConcise Step Description: Find two numbers that multiply to the product of the first coefficient 3 and the last term −7, which is −21, and add to the middle coefficient −20.Step Calculation: Factors of −21 that add up to −20 are −1 and −21.Step Output: Factors: −1, −21
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: Rewrite −20x as −x−21x.Step Output: Rewritten expression: 3x2−x−21x−7
Group Terms: Step Title: Group the TermsConcise Step Description: Group the terms in pairs to factor by grouping.Step Calculation: Group (3x2−x) and (−21x−7).Step Output: Grouped expression: (3x2−x)−(21x+7)
Factor Each Group: Step Title: Factor Each GroupConcise Step Description: Factor out the greatest common factor from each group.Step Calculation: Factor out x from the first group and −7 from the second group.Step Output: Factored groups: x(3x−1)−7(3x−1)
Factor Out Common Binomial: Step Title: Factor Out the Common BinomialConcise Step Description: Factor out the common binomial factor from the two groups.Step Calculation: Factor out (3x−1).Step Output: Factored expression: (3x−1)(x−7)