4x^2-41x+21=0

Simple and best practice solution for 4x^2-41x+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 4x^2-41x+21=0 equation:


Simplifying
4x2 + -41x + 21 = 0

Reorder the terms:
21 + -41x + 4x2 = 0

Solving
21 + -41x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
5.25 + -10.25x + x2 = 0

Move the constant term to the right:

Add '-5.25' to each side of the equation.
5.25 + -10.25x + -5.25 + x2 = 0 + -5.25

Reorder the terms:
5.25 + -5.25 + -10.25x + x2 = 0 + -5.25

Combine like terms: 5.25 + -5.25 = 0.00
0.00 + -10.25x + x2 = 0 + -5.25
-10.25x + x2 = 0 + -5.25

Combine like terms: 0 + -5.25 = -5.25
-10.25x + x2 = -5.25

The x term is -10.25x.  Take half its coefficient (-5.125).
Square it (26.265625) and add it to both sides.

Add '26.265625' to each side of the equation.
-10.25x + 26.265625 + x2 = -5.25 + 26.265625

Reorder the terms:
26.265625 + -10.25x + x2 = -5.25 + 26.265625

Combine like terms: -5.25 + 26.265625 = 21.015625
26.265625 + -10.25x + x2 = 21.015625

Factor a perfect square on the left side:
(x + -5.125)(x + -5.125) = 21.015625

Calculate the square root of the right side: 4.584280205

Break this problem into two subproblems by setting 
(x + -5.125) equal to 4.584280205 and -4.584280205.

Subproblem 1

x + -5.125 = 4.584280205 Simplifying x + -5.125 = 4.584280205 Reorder the terms: -5.125 + x = 4.584280205 Solving -5.125 + x = 4.584280205 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.125' to each side of the equation. -5.125 + 5.125 + x = 4.584280205 + 5.125 Combine like terms: -5.125 + 5.125 = 0.000 0.000 + x = 4.584280205 + 5.125 x = 4.584280205 + 5.125 Combine like terms: 4.584280205 + 5.125 = 9.709280205 x = 9.709280205 Simplifying x = 9.709280205

Subproblem 2

x + -5.125 = -4.584280205 Simplifying x + -5.125 = -4.584280205 Reorder the terms: -5.125 + x = -4.584280205 Solving -5.125 + x = -4.584280205 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.125' to each side of the equation. -5.125 + 5.125 + x = -4.584280205 + 5.125 Combine like terms: -5.125 + 5.125 = 0.000 0.000 + x = -4.584280205 + 5.125 x = -4.584280205 + 5.125 Combine like terms: -4.584280205 + 5.125 = 0.540719795 x = 0.540719795 Simplifying x = 0.540719795

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.709280205, 0.540719795}

See similar equations:

| 13x-19y=11 | | 32x^3-16x^2+2x=0 | | y=10x^3-15x^2-2x-3 | | 30a^8/6a^4 | | log(4x+5)=5 | | -3(y+4)=9y+48 | | 3x-3-6=0 | | 3log(4x+5)=15 | | 5v-34=-7(v-2) | | 5h^3b^4/6h^2b5 | | Ln(4)-Ln(6)=5 | | 5n^6+2n^5=0 | | 15.3+3.4t=3.4 | | 3x-4y+12=-4 | | 5(u+6)=2u+39 | | (x^2)+2x+4=0 | | x+(x+26)=100 | | X^2+4x-136=0 | | 38-4p=-6p+3(7-5p) | | (5x-3y)+(x+4y)-(4x+3y)= | | 24/6=5e | | -4(x-2)=-3(x-5) | | 3y^3-9y^2=0 | | 120x=240 | | 4x+8=-8x+7 | | .4=.5x-3 | | .7=19/x | | x+x+(x+87)=180 | | y=-x+74 | | k=C+273.15k | | -18=2/5(15-45) | | 10x-5x+160=10x+75 |

Equations solver categories