0=4u^2+20u-23

Simple and best practice solution for 0=4u^2+20u-23 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 0=4u^2+20u-23 equation:


Simplifying
0 = 4u2 + 20u + -23

Reorder the terms:
0 = -23 + 20u + 4u2

Solving
0 = -23 + 20u + 4u2

Solving for variable 'u'.

Combine like terms: 0 + 23 = 23
23 + -20u + -4u2 = -23 + 20u + 4u2 + 23 + -20u + -4u2

Reorder the terms:
23 + -20u + -4u2 = -23 + 23 + 20u + -20u + 4u2 + -4u2

Combine like terms: -23 + 23 = 0
23 + -20u + -4u2 = 0 + 20u + -20u + 4u2 + -4u2
23 + -20u + -4u2 = 20u + -20u + 4u2 + -4u2

Combine like terms: 20u + -20u = 0
23 + -20u + -4u2 = 0 + 4u2 + -4u2
23 + -20u + -4u2 = 4u2 + -4u2

Combine like terms: 4u2 + -4u2 = 0
23 + -20u + -4u2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-5.75 + 5u + u2 = 0

Move the constant term to the right:

Add '5.75' to each side of the equation.
-5.75 + 5u + 5.75 + u2 = 0 + 5.75

Reorder the terms:
-5.75 + 5.75 + 5u + u2 = 0 + 5.75

Combine like terms: -5.75 + 5.75 = 0.00
0.00 + 5u + u2 = 0 + 5.75
5u + u2 = 0 + 5.75

Combine like terms: 0 + 5.75 = 5.75
5u + u2 = 5.75

The u term is 5u.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5u + 6.25 + u2 = 5.75 + 6.25

Reorder the terms:
6.25 + 5u + u2 = 5.75 + 6.25

Combine like terms: 5.75 + 6.25 = 12
6.25 + 5u + u2 = 12

Factor a perfect square on the left side:
(u + 2.5)(u + 2.5) = 12

Calculate the square root of the right side: 3.464101615

Break this problem into two subproblems by setting 
(u + 2.5) equal to 3.464101615 and -3.464101615.

Subproblem 1

u + 2.5 = 3.464101615 Simplifying u + 2.5 = 3.464101615 Reorder the terms: 2.5 + u = 3.464101615 Solving 2.5 + u = 3.464101615 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + u = 3.464101615 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + u = 3.464101615 + -2.5 u = 3.464101615 + -2.5 Combine like terms: 3.464101615 + -2.5 = 0.964101615 u = 0.964101615 Simplifying u = 0.964101615

Subproblem 2

u + 2.5 = -3.464101615 Simplifying u + 2.5 = -3.464101615 Reorder the terms: 2.5 + u = -3.464101615 Solving 2.5 + u = -3.464101615 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + u = -3.464101615 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + u = -3.464101615 + -2.5 u = -3.464101615 + -2.5 Combine like terms: -3.464101615 + -2.5 = -5.964101615 u = -5.964101615 Simplifying u = -5.964101615

Solution

The solution to the problem is based on the solutions from the subproblems. u = {0.964101615, -5.964101615}

See similar equations:

| 18z-5=3(6z-2) | | (x/-6)=12 | | g(x)=x^2-3 | | (1/2)n=0.05 | | x-3=x+4 | | 3x^2+x+x^2=x^2+x+42 | | 2y+3=y^2-5 | | f(-1)=3x-3 | | 226-y=17 | | 163-w=241 | | -1/2x+4=x+1 | | 249=-x+159 | | f(2)=3x-3 | | 20-x^2=-29 | | A=0.5 | | 2x-6=1/2(4x-6) | | 85=173-v | | 26+x=43 | | 2x^2+69=51 | | 4(3m+2)=26 | | (3x-5)2=19 | | 25+x^2-10x=0 | | (x+1+x+1)/(x+1) | | 7x+3=5-2x | | -x^2-12x+27=0 | | -x-12x+27=0 | | x^3+x^2+16x=-16 | | y=2000x(0.5) | | x=2z-m/b | | x^2/18 | | y-120=600 | | -37+y=9.5 |

Equations solver categories