3x2+7=19

Simple and best practice solution for 3x2+7=19 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 3x2+7=19 equation:



3x^2+7=19
We move all terms to the left:
3x^2+7-(19)=0
We add all the numbers together, and all the variables
3x^2-12=0
a = 3; b = 0; c = -12;
Δ = b2-4ac
Δ = 02-4·3·(-12)
Δ = 144
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{144}=12$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-12}{2*3}=\frac{-12}{6} =-2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+12}{2*3}=\frac{12}{6} =2 $

See similar equations:

| 2/3m+(2/3m-3/10)=-5/6m-2/5 | | -5x-5=175 | | 6v+4=4v+16 | | 2x-6+3x+15=3x+x+1 | | 4x+9=6x=-17 | | 3=2-3(x+2) | | 6+13+9y=8y-3 | | x+16=96 | | 3=2-3(x+2 | | 2x+7=14(2+x) | | -5+2b=35 | | 13u—8u+-20u=11 | | 8(10+m)=104 | | 21​(x−7)=15 | | 7ℎ+ | | 10x-8=10x+4 | | -21=-6b-9 | | 2x-12+3x+2+x+30+-10=360 | | 2x-1=-60 | | 3(x+10)=39 | | 3v+9-5v=v-12 | | 5h^2-4=41 | | 10(n-10)=-60 | | 30.5+3y=8y+17 | | 2x+2-3x-4+5x-6+7x=220 | | 3a+4(-5+5a)=1-a | | a^2-25a+156=0 | | -5/6v=24 | | F(1)=x*2-4x+5 | | 15x+17=9x-13 | | 7y-7=70 | | s-5+29=6 |

Equations solver categories