Identify a, b, c: Identify a, b, and c in the quadratic expression 2x2−7x+5. Compare 2x2−7x+5 with ax2+bx+c. a=2b0b1
Find Product and Sum: Find two numbers whose product is a∗c (2∗5=10) and whose sum is b (−7).We need to find two numbers that multiply to 10 and add up to −7.The numbers −2 and −5 work because:−2∗−5=10−2+−5=−7
Rewrite Middle Term: Rewrite the middle term −7x using the two numbers found in Step 2.2x2−7x+5 can be rewritten as 2x2−2x−5x+5.
Factor by Grouping: Factor by grouping.Group the terms: (2x2−2x)+(−5x+5).Factor out the common factors from each group.2x(x−1)−5(x−1).
Factor out Common Factor: Factor out the common binomial factor (x−1).(2x−5)(x−1) is the factored form.