Question

How do you solve `30x - 45 =5x^2`?

Answer 1

`x=3`

Explanation:

`30x-45=5x^2`
multiply both sides with-1
`+30x+45=-5x^2`
`5x^2+30x+45=0`
`5(x^2+6x+9)=0`
`5(x-3)(x-3)=0`
multiply both sides by`1/(x-3)`
`5(x-3)=0`
`x-3=0`
`x=3`