-x2+3+4=2

Simple and best practice solution for -x2+3+4=2 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 -x2+3+4=2 equation:



-x2+3+4=2
We move all terms to the left:
-x2+3+4-(2)=0
We add all the numbers together, and all the variables
-1x^2+5=0
a = -1; b = 0; c = +5;
Δ = b2-4ac
Δ = 02-4·(-1)·5
Δ = 20
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{20}=\sqrt{4*5}=\sqrt{4}*\sqrt{5}=2\sqrt{5}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-2\sqrt{5}}{2*-1}=\frac{0-2\sqrt{5}}{-2} =-\frac{2\sqrt{5}}{-2} =-\frac{\sqrt{5}}{-1} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+2\sqrt{5}}{2*-1}=\frac{0+2\sqrt{5}}{-2} =\frac{2\sqrt{5}}{-2} =\frac{\sqrt{5}}{-1} $

See similar equations:

| −8p+1=42 | | X=8y+30 | | ((x+4)^2)=9 | | -7/x=10 | | p-4=-3p+12 | | /7y=63 | | 8(4v-3)+7v=-5(-8v+6) | | 0.4(y+0.7)=1.48 | | 2x-1x+3=9 | | p-4=-3p | | p15=13-6p | | 8x+-9=-9 | | k/4-336=17 | | W=4(w+1)=-24 | | 2(c-6)=-4 | | 34y=24 | | 1/2x-25=45 | | 3y+y−y−3y+2y=10 | | 21=-5h+13 | | (3x+1)+(2x+2)+x=180 | | -3r+14=-2-r | | 0.4(y+0.7=1.48 | | (4/3)y+2=4y-4 | | 30a-24=25a+26 | | 45=a•100 | | 2x2-1=3x+4 | | 45=1.05•a | | 8x+6=-12+2x | | (X+4)^=x^+4^ | | 4x+90=13x | | 15/8=y/30 | | 4y-45=-33 |

Equations solver categories