X2-x-56=0

Simple and best practice solution for X2-x-56=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 X2-x-56=0 equation:



X2-X-56=0
We add all the numbers together, and all the variables
X^2-1X-56=0
a = 1; b = -1; c = -56;
Δ = b2-4ac
Δ = -12-4·1·(-56)
Δ = 225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{225}=15$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1)-15}{2*1}=\frac{-14}{2} =-7 $
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+15}{2*1}=\frac{16}{2} =8 $

See similar equations:

| 24x^2+50x+21=0 | | 2x^2-12x-53=0 | | X^+x=56 | | 2+22+6+9=x+95 | | 4x+1x=10 | | 4-2v=-10 | | G(-x)=4x+9 | | 3x+1x=40 | | V=2.5(6.4−t) | | 2(3x-5)=4(2x+5) | | 27=1/3x+1 | | 2b-11b-(-5b)=12 | | 17/x+20=6 | | 220+0.25x=375 | | 4=1/6(5x-12) | | -70=-7(v+4) | | X-2/6+x+8/5=7/6 | | 12x2+4x−5=0 | | 8-7u=-20 | | 6x-2=4x+48 | | 7+5(r+3)=6+3(r−2) | | 1/5(5x-4)=-4/9-8/9 | | -37-(-21)=x/10 | | −11f=7-14f+5 | | 4=2x2 | | X=y^2-5y | | (t+1)(t−1)=(t+4)(t−5)+7 | | 1/2(x-1)+1/4=2/3x-1/6x+3/4 | | -x^2-5x-28=0 | | 27=3c-c(6-2c) | | 14+2(4g+-3)=40 | | 7+2x(5)=23x+2 |

Equations solver categories