(2y+3) (3y+4y+5)
apply distributive property:
2y(3y) + 2y (4y) + 2y(5) + 3 (3y) +3 (4y) + 3 (5)
6y^2 + 8 y^2 + 10y + 9y + 12 y + 15
Combine like terms:
14 y^2 + 31 y + 15
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