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 = 4.21221445 x = 4.21221445 Simplifying x = 4.21221445

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 = -0.71221445 x = -0.71221445 Simplifying x = -0.71221445

Solution

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

See similar equations:

| 5u^2+5u-2-(-4u^2+6u-13)= | | 40=-3x+10 | | 3c-17+20c+26= | | 9x^2+6x-11=0 | | -45=45-3z | | -60+3y+3=2(5y-4)-7 | | -26+6y+2=2(4y-5)-4 | | 14x+9=17x | | 2(12x-40)=6x-10 | | 2a-8+7a=3-4a+5 | | 290x-5=250x+3 | | 8x+14=9x | | 5u-2-(-4u-13)= | | -4(x+3)+6=-(3x-5)-7 | | -9=m+4-3 | | x^2+-1.25=0 | | (3x^2-4x+4)(1-x^2)= | | 100x^4-169y^6= | | 640=18x^2 | | p^2+2p+1=0 | | 640=18x | | 4(x+4)=2x+32 | | 16x^4-256x^2= | | ln(x-7)+ln(x+8)=1 | | y=10x-56.2 | | 5x+2+x=1+3x-2 | | 5x-5y=24 | | 9x-6=8x+12 | | 4x+3+x=1+3x+0 | | 6-3+4a=9+9a-11a | | 4x-6=3x+11 | | -1v+5+6v=1+5v+3 |

Equations solver categories