Question

(5y-2y^2+9) + (3y^2-12-3y)

Answer 1

Answer:

y = -3 or 1

Step-by-step explanation:

In order to solve the polynomials, you need to add them and then factor:

5y - 2y² + 9 + 3y² - 12 - 3y

Combine like terms:  y² + 2y - 3

Factor:  (y + 3)(y - 1)

Solve for y:  y + 3 = 0  and y - 1 = 0  or y = -3 or 1