Identify a, b, c: Identify a, b, and c in the quadratic expression 2t2+11t+9. Compare 2t2+11t+9 with ax2+bx+c. a=2b0b1
Find numbers multiply and add: Find two numbers that multiply to a∗c (2∗9=18) and add up to b (11).We need to find two numbers that multiply to 18 and add up to 11.The numbers 2 and 9 satisfy these conditions because 2∗9=18 and 2+9=11.
Rewrite middle term: Rewrite the middle term 11t using the two numbers found in Step 2.We can express 11t as the sum of 2t and 9t.So, 2t2+11t+9 becomes 2t2+2t+9t+9.
Factor by grouping: Factor by grouping.First, group the terms: 2t2+2t + 9t+9.Factor out the common factor from each group.From the first group, we can factor out 2t: 2t(t+1).From the second group, we can factor out 9: 9(t+1).
Write factored form: Write the factored form of the expression.Since both groups contain the factor (t+1), we can factor this out.The factored form is (2t+9)(t+1).
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