X(x-7)-4=0

Simple and best practice solution for X(x-7)-4=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 X(x-7)-4=0 equation: 



X(X-7)-4=0

We multiply parentheses

X^2-7X-4=0

a = 1; b = -7; c = -4;
Δ = b2-4ac
Δ = -72-4·1·(-4)
Δ = 65
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-7)-\sqrt{65}}{2*1}=\frac{7-\sqrt{65}}{2}
$


$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-7)+\sqrt{65}}{2*1}=\frac{7+\sqrt{65}}{2}
$

See similar equations:

| -64=-4(1+5b) | | -3(u-17)=-9 | | 2r-2=72 | | 5/18x=-20/27 | | m/2+12=30 | | -y^2-1=0 | | 6p-4p+2p-4p=-4p | | 5x-73=2x+11 | | r2+12r+36=0 | | 10+4n=4n+3 | | 3^4x+10=81 | | 3(4x+10)=81 | | ×-6=5(x+2) | | 350x=2000 | | p²-7p=12 | | Y=180-2x÷2 | | q/4+3=2 | | 15x+12=2(x+15) | | 9w-7w= | | |5x-3|=|6x-3| | | 21/2n=3n+16 | | 4(x-1)^2-9(x-2)^2=0 | | -16=-4+x/3 | | 40+s=52 | | 2(x-2)2-8=-4 | | 12/7x(x-5)=24 | | (3x-3)2=36 | | 7x+2=-3x-5 | | z-29=30 | | 0.8x+x+500=1500 | | g-23=29 | | r+-95=-37 |

Equations solver categories