Identify Coefficients: Identify the coefficients of the quadratic expression.The quadratic expression is 5x2+12x+7.Here, a=5, b=12, and c=7.
Find Multiplying Numbers: Find two numbers that multiply to a∗c (5∗7=35) and add up to b (12).We need to find two numbers that multiply to 35 and add up to 12.The numbers 5 and 7 satisfy these conditions because 5∗7=35 and 5+7=12.
Write Middle Term: Write the middle term 12x as the sum of two terms using the numbers found in the previous step.We can express 12x as 5x+7x.So, the expression becomes 5x2+5x+7x+7.
Factor by Grouping: Factor by grouping.Group the terms as follows: (5x2+5x)+(7x+7).Factor out the common factors from each group.From the first group, we can factor out 5x, and from the second group, we can factor out 7.This gives us 5x(x+1)+7(x+1).
Factor Common Binomial: Factor out the common binomial factor.Both groups contain the common factor (x+1).Factor this out to get the final factored form: (5x+7)(x+1).