5r^2+12r+7=0

Simple and best practice solution for 5r^2+12r+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 5r^2+12r+7=0 equation: 



5r^2+12r+7=0

a = 5; b = 12; c = +7;
Δ = b2-4ac
Δ = 122-4·5·7
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$


$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(12)-2}{2*5}=\frac{-14}{10}
=-1+2/5
$


$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(12)+2}{2*5}=\frac{-10}{10}
=-1
$

See similar equations:

| 150/x=-25 | | 2(4x+5)=2(4x)+2(5) | | x0.33=8= | | 16x-12=10x+18 | | -9x2+3x-11=0 | | x+20+4x+30=90 | | 4x-4+3x+30=180 | | 2x+20+4x+16=90 | | x-25+x+15=180 | | x^2-10=5x-4 | | 4e+-4=e+-4 | | 2^x=72 | | 5/y=15/18 | | 4^(x+7)=19^x | | 28=w/3+17 | | 28=w/3=17 | | 16x^2-40x+25=14x^2-47x+34 | | -6+1p+9=8-4p | | (8.4)x=6.3 | | -4+7(3x+2)=52 | | 2x-29+10x-5=180 | | 2/5x+17=4/3x-39 | | 4y-14=-21 | | 8(n-5)=32 | | 3(x+1)-2=22 | | 4921=x-0.15x | | 13x+7=22 | | x+165+145=180 | | x+98+45=18- | | 0.49-x*2*1.53=0 | | 7.58+0.49-x*2*1.53=7.58 | | 7.09-x*3.06=5.00 |

Equations solver categories