6u^2+5u+21=0

Simple and best practice solution for 6u^2+5u+21=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 6u^2+5u+21=0 equation:


Simplifying
6u2 + 5u + 21 = 0

Reorder the terms:
21 + 5u + 6u2 = 0

Solving
21 + 5u + 6u2 = 0

Solving for variable 'u'.

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

Divide each side by '6'.
3.5 + 0.8333333333u + u2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + 0.8333333333u + -3.5 + u2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + 0.8333333333u + u2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + 0.8333333333u + u2 = 0 + -3.5
0.8333333333u + u2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
0.8333333333u + u2 = -3.5

The u term is 0.8333333333u.  Take half its coefficient (0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
0.8333333333u + 0.1736111111 + u2 = -3.5 + 0.1736111111

Reorder the terms:
0.1736111111 + 0.8333333333u + u2 = -3.5 + 0.1736111111

Combine like terms: -3.5 + 0.1736111111 = -3.3263888889
0.1736111111 + 0.8333333333u + u2 = -3.3263888889

Factor a perfect square on the left side:
(u + 0.4166666667)(u + 0.4166666667) = -3.3263888889

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| x(x+4)=92 | | 4(k-5)-3(k+1)-13=-27 | | 7x+137=375 | | 3x-6(0)=0 | | 2-19/t=-5 | | (x-15)(x-2)= | | -10v-11+8v+5=32 | | 81xy^2-8y^3=1 | | 4w+-26=82 | | 7-9y=4-7y | | 4y^2+28y+49=49 | | -6(3w+1)-w=32 | | 12-1/2m=9 | | -14=-(z+5) | | 3x+73=2(6x-4) | | 2x+3=9+4x | | R/9-17=21 | | 10-1/3x=4 | | 20a^3b/5a^2b^2 | | 4n+4=11n-3 | | 30x^2+23x-14=0 | | 46=8x+18+6x | | -4x^2-19x+40=0 | | (x+2)(x-10)= | | 3(3x-1)=2(3x+1) | | 12+5p=-23.8 | | 2n+7-7n=34-11n+21 | | 10x=260 | | 3^2n1/9 | | 7(4x+7)-10x= | | 5n+4=6n | | 2q+10=0 |

Equations solver categories