7n^2+5n-7=0

Simple and best practice solution for 7n^2+5n-7=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 7n^2+5n-7=0 equation: 



7n^2+5n-7=0

a = 7; b = 5; c = -7;
Δ = b2-4ac
Δ = 52-4·7·(-7)
Δ = 221
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{221}}{2*7}=\frac{-5-\sqrt{221}}{14}
$


$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{221}}{2*7}=\frac{-5+\sqrt{221}}{14}
$

See similar equations:

| y^2+15y-30=0 | | 7n^2-5n-7=0 | | -4/5x+7=-1/3 | | 88r÷21+2r=260 | | -2(m=+6)+1=-5(m+1)+3 | | 85+(6x+2)=18x+3 | | 10=x4x= | | 4a=12* | | 68-8x/12=56 | | 40+18x-3=468 | | -3-m=4. | | 4(-1+x)=-4(x-5) | | 4x+2x+8=6+8 | | x/4-3/4=1 | | -2(6v+5)-7=-113 | | 5=0,5*2+b | | 6+3p/5=16 | | ∣5x+9∣=  4x4x | | 0.7x-11=3.5x-25 | | 5(x+3)+6x=92 | | 25–2x=7x-20 | | -1-2x=-3-2x | | -4(5y-3)-y=-2(y-4) | | 1/3x+1/5=4(3/4x+5) | | 2+3r+1=3(-3r+3)+3(2+3r) | | 2(x-6)=3x-14 | | 11x-7-11x-7=14x+2 | | -14+7f=21 | | x^-3-10=0 | | (x+40)°=(3x) | | -5(3y-5)-y=-2(y-4) | | 2(x+3)=-2(1-3x)-2x |

Equations solver categories