Identify Coefficients: Identify the coefficients of the quadratic expression.The quadratic expression is 5x2+14x−3. Here, the coefficient of x2(a) is 5, the coefficient of x(b) is 14, and the constant term (c) is −3.
Find Multiplying Numbers: Look for two numbers that multiply to ac (a times c) and add up to b. We need to find two numbers that multiply to (5)(−3)=−15 and add up to 14. The numbers that satisfy these conditions are 15 and −1 because 15×−1=−15 and 15+(−1)=14.
Rewrite Middle Term: Rewrite the middle term using the two numbers found in Step 2.We can express 14x as 15x−x. So, the expression becomes 5x2+15x−x−3.
Factor by Grouping: Factor by grouping.We group the terms as follows: (5x2+15x)−(x+3). Now we 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 −1.This gives us: 5x(x+3)−1(x+3).
Factor Common Binomial: Factor out the common binomial factor.We can now see that (x+3) is a common factor in both terms. Factoring this out gives us: (x+3)(5x−1).