Question

-3x(x+4)+15=6-4x
This is for homework please help

Answer 1

`-3x(x+4)+15=6-4x`

`-3x^2-12x+15=6-4x`

`-3x^2-12x+4x+15-6=0`

`-3x^2-8x+9=0`

this is the form

`ax^2+bx+c=0`
with a=-3, b=-8 and c=9

the solutions are


`x=(-b\pm √(b^2-4ac))/(2a)`

put a, b and c we have


`x=(-4\pm √(43))/(3)`