SOLUTION: how do you solve (3-y)(y+4)=3y-5

Question 765432: how do you solve (3-y)(y+4)=3y-5
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
(3-y)(y+4)=3y-5
3y+12-y^2-4y=3y-5
y^2+4y-17=

then...

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=84 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 2.58257569495584, -6.58257569495584. Here's your graph:

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