3r^2-5r+10=0

Simple and best practice solution for 3r^2-5r+10=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 3r^2-5r+10=0 equation:


Simplifying
3r2 + -5r + 10 = 0

Reorder the terms:
10 + -5r + 3r2 = 0

Solving
10 + -5r + 3r2 = 0

Solving for variable 'r'.

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
3.333333333 + -1.666666667r + r2 = 0

Move the constant term to the right:

Add '-3.333333333' to each side of the equation.
3.333333333 + -1.666666667r + -3.333333333 + r2 = 0 + -3.333333333

Reorder the terms:
3.333333333 + -3.333333333 + -1.666666667r + r2 = 0 + -3.333333333

Combine like terms: 3.333333333 + -3.333333333 = 0.000000000
0.000000000 + -1.666666667r + r2 = 0 + -3.333333333
-1.666666667r + r2 = 0 + -3.333333333

Combine like terms: 0 + -3.333333333 = -3.333333333
-1.666666667r + r2 = -3.333333333

The r term is -1.666666667r.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667r + 0.6944444447 + r2 = -3.333333333 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667r + r2 = -3.333333333 + 0.6944444447

Combine like terms: -3.333333333 + 0.6944444447 = -2.6388888883
0.6944444447 + -1.666666667r + r2 = -2.6388888883

Factor a perfect square on the left side:
(r + -0.8333333335)(r + -0.8333333335) = -2.6388888883

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 4y-10=3y+22 | | -8+2x=x+16 | | y=0.05x+25 | | X+12=4x-30 | | 7x+5-4x=-1 | | 4x+12=4x-30 | | 8x(7x+15)=180 | | 2x+4=-34 | | 0=5x(5x-6) | | (2d+3)*(3d+2)= | | 3(e+2)-e=26 | | 25x-8+50x=19 | | 3v^5=192v^3 | | 36-3b=30 | | 2d+7=31-4d | | 2x-7+4x=29 | | 20-2a=12 | | 2(-15-7y)+5y=-12 | | 9+2f=27 | | 8(3n+4)=38 | | 133x=.07 | | 3a-1=35 | | 6x+2(5-3x)=12 | | -8c-4c= | | 37-4x=13-10x | | -7x+27=6(x-2) | | -12n=-60 | | -3x+11=x-9 | | 2=17(3)-4(b) | | 5x-8x-y+12x= | | x=-1.6+0.4y | | X^18=4 |

Equations solver categories