Identify Quadratic Expression: Identify the quadratic expression to be factored.The given quadratic expression is 2x2−7x+3. We need to find two binomials that multiply to give this expression.
Find Multiplying Numbers: Find two numbers that multiply to the product of the coefficient of x2 (which is 2) and the constant term (which is 3), and add up to the coefficient of x (which is −7).The product of the coefficient of x2 and the constant term is 2×3=6.We need two numbers that multiply to 6 and add up to −7.The numbers that satisfy these conditions are −6 and 20 because 21 and 22.
Rewrite Middle Term: Rewrite the middle term of the quadratic expression using the two numbers found in Step 2.The original expression is 2x2−7x+3.Rewrite −7x as −6x−x to get 2x2−6x−x+3.
Factor by Grouping: Factor by grouping.Group the terms into two pairs: (2x2−6x) and (−x+3).Factor out the common factor from each pair.From the first pair, factor out 2x: 2x(x−3).From the second pair, factor out −1: −1(x−3).Now we have 2x(x−3)−1(x−3).
Factor out Common Factor: Factor out the common binomial factor.The common binomial factor is (x−3).Factor this out to get (x−3)(2x−1).
More problems from Add, subtract, multiply, and divide polynomials