Identify a, b, c: Identify a, b, and c in the quadratic expression 2p2+9p+9. Compare 2p2+9p+9 with ax2+bx+c. a=2b0b1
Find numbers multiply add: Find two numbers that multiply to a∗c (2∗9=18) and add up to b (9).We need to find two numbers that multiply to 18 and add up to 9.After checking possible pairs that multiply to 18 (1 and 18, 2 and 9, 2∗9=181 and 2∗9=182), we see that 2∗9=181 and 2∗9=182 add up to 9.Two numbers: 2∗9=181, 2∗9=182
Rewrite middle term: Rewrite the middle term of the quadratic expression using the two numbers found in Step 2.2p2+9p+9 can be expressed as 2p2+3p+6p+9.
Factor by grouping: Factor by grouping.Group the terms: 2p2+3p + 6p+9.Factor out a common factor from each group.From the first group, we can factor out p: p(2p+3).From the second group, we can factor out 3: 3(2p+3).
Write factored form: Write the factored form of the expression.Since both groups contain the common factor (2p+3), we can factor this out:p(2p+3)+3(2p+3)=(p+3)(2p+3).
Verify factored form: Verify the factored form by expanding it to ensure it matches the original expression. (p+3)(2p+3)=2p2+3p+6p+9=2p2+9p+9.The expanded form matches the original expression, so the factoring is correct.
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