2x^2+7x-6=0

Simple and best practice solution for 2x^2+7x-6=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 2x^2+7x-6=0 equation:


Simplifying
2x2 + 7x + -6 = 0

Reorder the terms:
-6 + 7x + 2x2 = 0

Solving
-6 + 7x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-3 + 3.5x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 3.5x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 3.5x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 3.5x + x2 = 0 + 3
3.5x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
3.5x + x2 = 3

The x term is 3.5x.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5x + 3.0625 + x2 = 3 + 3.0625

Reorder the terms:
3.0625 + 3.5x + x2 = 3 + 3.0625

Combine like terms: 3 + 3.0625 = 6.0625
3.0625 + 3.5x + x2 = 6.0625

Factor a perfect square on the left side:
(x + 1.75)(x + 1.75) = 6.0625

Calculate the square root of the right side: 2.46221445

Break this problem into two subproblems by setting 
(x + 1.75) equal to 2.46221445 and -2.46221445.

Subproblem 1

x + 1.75 = 2.46221445 Simplifying x + 1.75 = 2.46221445 Reorder the terms: 1.75 + x = 2.46221445 Solving 1.75 + x = 2.46221445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 2.46221445 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 2.46221445 + -1.75 x = 2.46221445 + -1.75 Combine like terms: 2.46221445 + -1.75 = 0.71221445 x = 0.71221445 Simplifying x = 0.71221445

Subproblem 2

x + 1.75 = -2.46221445 Simplifying x + 1.75 = -2.46221445 Reorder the terms: 1.75 + x = -2.46221445 Solving 1.75 + x = -2.46221445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -2.46221445 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -2.46221445 + -1.75 x = -2.46221445 + -1.75 Combine like terms: -2.46221445 + -1.75 = -4.21221445 x = -4.21221445 Simplifying x = -4.21221445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.71221445, -4.21221445}

See similar equations:

| 3x-2(8x-1)=7x-38 | | -3+r=-1.35 | | 9m-6=-36+3m | | -21=5.5+b-2 | | -5u-17=-57-u | | 3(3-1-2)+6(2-4)= | | 4.1+d=19.3 | | 4p-27=13+9p | | 3.4x-1.7=6.8 | | 13=3-t | | 19(v+1)-3v=4(4v+3)-16 | | -7(7x+10)=16x-5 | | 4x-y=67 | | -5x-13=-68 | | 5x+8y-2=0 | | 0.6(2a-3)-0.2=0.2(3a-4) | | 7x+4=-17 | | 3x-4=-1 | | -4x-3=1 | | y+8x=16 | | 3(3+6x)-2=25 | | -1.5x+y=0 | | 2(2x+20)=8x+38 | | 16-a^4=0 | | 6v-8-4v=-2 | | 4x-3=-1 | | 3x^2+6x-297=0 | | (x^2+4x+4)(x+2)=0 | | 3x-1=-4 | | 6(-4x-2)=132 | | 2(5n+7)=3n+1 | | 8x+7=-17 |

Equations solver categories