5y( y + 3) - 2(y - 2) = 20 ​

Question

`5y( y + 3) - 2(y - 2) = 20`
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Answer 1

Explanation:

5y^2+15y-2y+4=20

5y^2-13y+4=20

5y^2-13y+4-20=0

5y^2-13y-16=0

This equation is in standard form: ax^2+bx+c=0. Substitute 5 for a, 13 for b, and −16 for c in the quadratic formula.

Answer 2

`y = ( - 13 - √(489) )/(10)`