(2x^2)-7x-3=0

Simple and best practice solution for (2x^2)-7x-3=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-3=0 equation:


Simplifying
(2x2) + -7x + -3 = 0

Reorder the terms:
-3 + -7x + (2x2) = 0

Solving
-3 + -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'.
-1.5 + -3.5x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -3.5x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -3.5x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -3.5x + x2 = 0 + 1.5
-3.5x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-3.5x + x2 = 1.5

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 = 1.5 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = 1.5 + 3.0625

Combine like terms: 1.5 + 3.0625 = 4.5625
3.0625 + -3.5x + x2 = 4.5625

Factor a perfect square on the left side:
((x) + -1.75)((x) + -1.75) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
((x) + -1.75) equal to 2.136000936 and -2.136000936.

Subproblem 1

(x) + -1.75 = 2.136000936 Simplifying (x) + -1.75 = 2.136000936 x + -1.75 = 2.136000936 Reorder the terms: -1.75 + x = 2.136000936 Solving -1.75 + x = 2.136000936 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 = 2.136000936 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = 2.136000936 + 1.75 x = 2.136000936 + 1.75 Combine like terms: 2.136000936 + 1.75 = 3.886000936 x = 3.886000936 Simplifying x = 3.886000936

Subproblem 2

(x) + -1.75 = -2.136000936 Simplifying (x) + -1.75 = -2.136000936 x + -1.75 = -2.136000936 Reorder the terms: -1.75 + x = -2.136000936 Solving -1.75 + x = -2.136000936 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 = -2.136000936 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = -2.136000936 + 1.75 x = -2.136000936 + 1.75 Combine like terms: -2.136000936 + 1.75 = -0.386000936 x = -0.386000936 Simplifying x = -0.386000936

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.886000936, -0.386000936}

See similar equations:

| -10+x=7 | | 7x+[x-(5+x)]= | | 15=3x-4+2(-3x+2) | | -8y-34=0 | | 4(k+2)-8(k-1)=3(k+1)-1 | | 11-6(7-m)=-5+6m | | 2x+(x+y+10)=180 | | 6p-8=12+5p | | -3b=-9 | | 6x^4y^4-18x^3y^5= | | 8-x=7x+8 | | (2x-4)2=0 | | 0=2y+14 | | -22m=-(x-4) | | 5=10k | | 2x-4*2=0 | | 16=3.3a | | 0.5+-3t+5=0 | | uu+2u-3=0 | | x^3-9x^2-4x+36=0 | | 5t+2=5(t+5)-23 | | 14+12=15x+2x | | 5(-3a-12)=-4(a+4) | | -22=x+16 | | .66666x-.5y=12 | | 5x-1=5(x+4) | | 21+4(32-5)= | | 5X*0.083=8X | | 215=65+15w | | 5t-9=-t-15 | | 11x+15y+5z=1 | | 9x+20+2y+7x=180 |

Equations solver categories