Look for common factor: Look for a common factor in all terms.Identify the greatest common factor (GCF) of the terms 5x2, 20x, and −60.The GCF is 5.
Factor out GCF: Factor out the GCF from the expression.Divide each term by the GCF and write the expression as a product of the GCF and the remaining terms.5x2+20x−60=5(x2+4x−12)
Factor quadratic expression: Factor the quadratic expression inside the parentheses.We need to find two numbers that multiply to −12 and add to 4.The numbers 6 and −2 satisfy these conditions because 6×(−2)=−12 and 6+(−2)=4.
Write factored form: Write the factored form of the quadratic expression.Replace the middle term, 4x, with the two terms found in Step 3, and then group the terms to factor by grouping.5(x2+6x−2x−12)= 5((x2+6x)−(2x+12))
Factor by grouping: Factor by grouping.Factor out the common factor from each group.5((x(x+6))−2(x+6))
Factor out common binomial: Factor out the common binomial factor.The common binomial factor is (x+6).5(x+6)(x−2)