7y2+18y+-8=0

Simple and best practice solution for 7y2+18y+-8=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 7y2+18y+-8=0 equation:



7y^2+18y+-8=0
We add all the numbers together, and all the variables
7y^2+18y=0
a = 7; b = 18; c = 0;
Δ = b2-4ac
Δ = 182-4·7·0
Δ = 324
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{324}=18$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(18)-18}{2*7}=\frac{-36}{14} =-2+4/7 $
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(18)+18}{2*7}=\frac{0}{14} =0 $

See similar equations:

| 6(x+-4)+3x=12x+-8 | | 4m+12=-18+2m | | 20+20+2y=8y-20 | | 7d=8d+7 | | -7r-8+8r=8+3r | | 19v=20v+16 | | -19v=20v+16 | | z/8+6=8 | | 2x=3x=5x+3 | | 2x3-2x=x^2-1 | | -4u+8=-6u-6 | | 8z-6=-2+6z | | 3y-25=52 | | 7h-4+5=3h+9 | | s*7-27=141 | | 8=(x-2) | | 41=4x^-1/3+40 | | 3=(m+9) | | 2x+3x+6=46 | | 4x+2x+3=39 | | 180=5x+(2x+4) | | x+210=180 | | (2x+20)x=0 | | 3=-6+u/3 | | 2/7x+3/7x=2 | | 12y-38=38 | | 7f+2(f–1)=79 | | 2x/3=3/2x | | m/2=3/4 | | 39x=-87 | | (7-x)x(2x-4)=0 | | 3(4x-2)-5=6-7(-x-2) |

Equations solver categories