D AY 138 – F ACTORING T RINOMIAL
E XAMPLE 1 Factor each trinomial. a) 𝒚 𝟑 − 𝒚 − 𝟑𝟏 b) 𝒚 𝟑 − 𝟐𝟏𝒚 + 𝟐𝟕 c) 𝒚 𝟑 + 𝟓𝒚 − 𝟑𝟐 d) 𝒚 𝟑 + 𝟘𝒚 + 𝟐𝟗
A NSWER a) Use trinomial pattern d. 𝑦 2 − 𝑦 − 20 = (𝑦 + 4)(𝑦 − 5) b) Use trinomial pattern b. 𝑦 2 − 10𝑦 + 16 = (𝑦 − 2)(𝑦 − 8) c) Use trinomial pattern c. 𝑦 2 + 4𝑦 − 21 = (𝑦 − 3)(𝑦 + 7) d) Use trinomial pattern a. 𝑦 2 + 9𝑦 + 18 = (𝑦 + 6)(𝑦 + 3)
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