x2-4=0

Simple and best practice solution for x2-4=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 x2-4=0 equation:



x2-4=0
We add all the numbers together, and all the variables
x^2-4=0
a = 1; b = 0; c = -4;
Δ = b2-4ac
Δ = 02-4·1·(-4)
Δ = 16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{16}=4$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4}{2*1}=\frac{-4}{2} =-2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4}{2*1}=\frac{4}{2} =2 $

See similar equations:

| 8x^2+x-20=2x^2+8x | | (5x/7)+5=30 | | 2/3t-18=1/3t-20 | | (4y+2)^2=4 | | (5x/3)+5=30 | | 5/8x=-9/10 | | m∠1+m∠2(4)=85 | | 5(x+3)=9(x-13) | | 3(x-4)/4-x=1-x/6 | | 5x17=29 | | 12x−35=25x+12 | | 4s+4872-6s=2200 | | (2x/3)+1=3 | | (x/7)+9=15 | | 5^x+25=100 | | 800(2^2t)=1 | | (x/5)+1=7 | | 800(2^2t)=0 | | 56=20x-13x | | b-2/5=b+3/4 | | Y=18.947-0.8947x | | 3(x-2)=-4(x+7) | | 42x^2+67x+10=0 | | 3(4x-6)=2(3x+10)-2 | | 0,75x=5(x+1/2) | | 57+y=121 | | 3(x-2)=-4(x+7 | | -1+x/3=7 | | 8+7(9x-6)=-9-9(7x+2) | | 12a=140 | | |x-3|=5x+5 | | x=9/5(2x+32) |

Equations solver categories