4x^2-3x=8

Simple and best practice solution for 4x^2-3x=8 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^2-3x=8 equation:


Simplifying
4x2 + -3x = 8

Reorder the terms:
-3x + 4x2 = 8

Solving
-3x + 4x2 = 8

Solving for variable 'x'.

Reorder the terms:
-8 + -3x + 4x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-8 + -3x + 4x2 = 0

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

Divide each side by '4'.
-2 + -0.75x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -0.75x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -0.75x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -0.75x + x2 = 0 + 2
-0.75x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-0.75x + x2 = 2

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = 2 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = 2 + 0.140625

Combine like terms: 2 + 0.140625 = 2.140625
0.140625 + -0.75x + x2 = 2.140625

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = 2.140625

Calculate the square root of the right side: 1.463087489

Break this problem into two subproblems by setting 
(x + -0.375) equal to 1.463087489 and -1.463087489.

Subproblem 1

x + -0.375 = 1.463087489 Simplifying x + -0.375 = 1.463087489 Reorder the terms: -0.375 + x = 1.463087489 Solving -0.375 + x = 1.463087489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = 1.463087489 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = 1.463087489 + 0.375 x = 1.463087489 + 0.375 Combine like terms: 1.463087489 + 0.375 = 1.838087489 x = 1.838087489 Simplifying x = 1.838087489

Subproblem 2

x + -0.375 = -1.463087489 Simplifying x + -0.375 = -1.463087489 Reorder the terms: -0.375 + x = -1.463087489 Solving -0.375 + x = -1.463087489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = -1.463087489 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = -1.463087489 + 0.375 x = -1.463087489 + 0.375 Combine like terms: -1.463087489 + 0.375 = -1.088087489 x = -1.088087489 Simplifying x = -1.088087489

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.838087489, -1.088087489}

See similar equations:

| 6/a-10=9/8 | | x+4=4(y*.25+2) | | 4x+24=3x+3 | | 2+4=3x+8 | | 1.13T=75n+D | | x+4=4(y*4+2) | | 0.05(x+30)-0.03(x-20)=1.9 | | 6x-y=145 | | 2(3+2x)-5=9 | | 5y-4+y+44=6y+40-2y | | 5x-5=4(x+1)+8 | | x(4-y)=0 | | 28x^3/35x^7 | | 3v^2-11v+8=0 | | V=x+ng | | 4x-3yz=8 | | 5r-7.8=6.7r-22.25 | | .5/10 | | 10x/7-10=8 | | 6t+4t=30 | | 2X+10+X+5=90 | | 80+r=395 | | -6x+105=14x+7-13x | | 2x+5=6x+66 | | 7s^2+5s-2=0 | | -5+6y=4 | | 3/2n=9 | | 12-54/11 | | -34.3x=102.9 | | 11/2n=9 | | 9=5x-2+3(2x+1) | | 8x+4=-x+4 |

Equations solver categories