-15+7x+2x2=0

Simple and best practice solution for -15+7x+2x2=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 -15+7x+2x2=0 equation:



-15+7x+2x^2=0
a = 2; b = 7; c = -15;
Δ = b2-4ac
Δ = 72-4·2·(-15)
Δ = 169
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{169}=13$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-13}{2*2}=\frac{-20}{4} =-5 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+13}{2*2}=\frac{6}{4} =1+1/2 $

See similar equations:

| -3f+3(-3f+5)=-8 | | 5x-(x+1)=8+2(x-3) | | -185=-3r4(-5r+8) | | -185=-3r4(-5r+8 | | 3(x-2)=21+12x | | 3s+4=2+6 | | 6x+6(6x+x+6)-3=10   | | 12+4(2x+4)=16x | | 4x+8/3-2x-3/4=1 | | W=40-p | | 7m-13m=25 | | 27=x/5+14 | | F(×)=4x | | 2^(x+2)+2^(x-2)+2^(2)=84 | | h+6/5=2/5 | | 14=(24.5/7)x | | f+3(3.1415)=7(3.1415) | | -.50x+7=-4 | | 73.5=7x | | 4.3+-2.1t-2,3=7.6 | | 13=x/5-14 | | -3r+0=-4r+5 | | 4/9x12=-1/6(x-12)-3 | | 8−3x=14−4x | | 4z+5(3z+9)=1 | | 2k-3(2k-3)=4 | | 36-4x-2(3x-5)=15 | | 21x+1=22 | | 45x+6=141 | | 5(×+2)=4(x+3)-2 | | 6x2+19=0 | | 6x+6(6x+x+6)-3=10 |

Equations solver categories