7m^2-21m-70=0

Simple and best practice solution for 7m^2-21m-70=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 7m^2-21m-70=0 equation:



7m^2-21m-70=0
a = 7; b = -21; c = -70;
Δ = b2-4ac
Δ = -212-4·7·(-70)
Δ = 2401
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{2401}=49$
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-21)-49}{2*7}=\frac{-28}{14} =-2 $
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-21)+49}{2*7}=\frac{70}{14} =5 $

You can always share this solution

See similar equations:

| 2^n-2=1000 | | 3z^+7z+20=0 | | -77+10x^2=-x^2 | | -19=-5u+3(u-3) | | 3,2x-3+1,8x=-3+5x | | 3x?45=?12 | | 4,5x+7=3+4,5x | | 4×x-2+3=19 | | -3+3x=15 | | 8=z+6 | | 7z-14=21 | | 9t+19t=84 | | 9r-55=-9r=53 | | 9=9n=7n-1 | | 6g-1=9+1g | | 6-2x=2x+9 | | 1/3x+7=3x+2 | | Y=7x^2-1.5 | | 10x–5=-5x-5+15x | | 15x+4-2x=18x+15 | | 10x-30=25x+15 | | 2-9^(-8x)=12 | | 9x+12=-32 | | 3x-17=5x+21=90 | | 3x-17=5x+21=180 | | x+2=26-6 | | 2-8y=-54 | | 3m(m-2)=11 | | 7/6x=7.5 | | n+9=2 | | 2x=4x-72 | | (x+10)/x=12 | | 4x-x/2-3=12 | | (x+5)/x=6 | | x*0.02=115000 | | 3x-15=2x+10+180 | | x+5/x=6 | | 3x/4-1/2=0 | | 8x=2x+60+180 | | 2.5x+x=525 | | 10/12=x/7 | | 10/12=7/x | | 24b-48=6b-18 | | (6x+3)=(10x+1) | | 2/7(x?2)=4x | | 4b-12=16b-32 | | |3t-11|=22 | | -243=-9(10÷x) | | 20=6-0.3j | | 2w-4=-16 | | (100x-99)^3=(5x)^6 | | 5(100+-1.6y)+8y=500 | | 4x-3+47=280 | | 545.82=4x+17.82 | | 4(4+d)=3(2+2d) | | 12(4+j)=108 | | 13t=325 | | t(13)=5(65) | | F(x)=3x^2(5x^3+8) | | 216=6^(4x+11) | | (x+5)(x+2)-3(4x-3)=(5-x)^2 | | 3/4n+7=34 | | 2/3t=118 | | F(x)=3x^2(x13)^5 | | F(x)=3x(x13)^5 |

Equations solver categories