2x2+7=105

Simple and best practice solution for 2x2+7=105 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 2x2+7=105 equation:



2x^2+7=105
We move all terms to the left:
2x^2+7-(105)=0
We add all the numbers together, and all the variables
2x^2-98=0
a = 2; b = 0; c = -98;
Δ = b2-4ac
Δ = 02-4·2·(-98)
Δ = 784
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{784}=28$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-28}{2*2}=\frac{-28}{4} =-7 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+28}{2*2}=\frac{28}{4} =7 $

See similar equations:

| 3k-1=7k-1=7k+2 | | 276=137-w | | 280=-x+46 | | 6a+3+2a=1 | | |2x+5|=x-9 | | 1/3n-5/6=10 | | 3/2n+1/2=8 | | -7+8(-2n-3)=-159 | | 3x/5-5=8 | | 4-1n=5+1 | | x+x*0.05=450 | | 3/4(n+4)=3/4 | | 26+8x-8=42 | | -104=-4(4x+2) | | -13n+n+5+6=5+4n-4 | | 6d-1/3(6-9d)=16 | | 1/2x-5=-7 | | 10x4+(x+5)+1=-7 | | x^2+.x-30=0 | | x÷12=7/12 | | -121=8-3(-5m+3) | | 2(6)=75-7x | | X+2y=98. | | 7a-(3-a)=5a-18 | | 5z+8=3z+13 | | 6(9+x)=6x+2 | | 28=-1/2x | | 6n-28=-4(-7n-4) | | -2.25+x=-0.59 | | 6n-28=-4(-7n-4 | | |7x-6|=15 | | x+2(x=7)=3x-7 |

Equations solver categories