2x^2+5x-154=0

Simple and best practice solution for 2x^2+5x-154=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+5x-154=0 equation:


Simplifying
2x2 + 5x + -154 = 0

Reorder the terms:
-154 + 5x + 2x2 = 0

Solving
-154 + 5x + 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'.
-77 + 2.5x + x2 = 0

Move the constant term to the right:

Add '77' to each side of the equation.
-77 + 2.5x + 77 + x2 = 0 + 77

Reorder the terms:
-77 + 77 + 2.5x + x2 = 0 + 77

Combine like terms: -77 + 77 = 0
0 + 2.5x + x2 = 0 + 77
2.5x + x2 = 0 + 77

Combine like terms: 0 + 77 = 77
2.5x + x2 = 77

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = 77 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = 77 + 1.5625

Combine like terms: 77 + 1.5625 = 78.5625
1.5625 + 2.5x + x2 = 78.5625

Factor a perfect square on the left side:
(x + 1.25)(x + 1.25) = 78.5625

Calculate the square root of the right side: 8.863548951

Break this problem into two subproblems by setting 
(x + 1.25) equal to 8.863548951 and -8.863548951.

Subproblem 1

x + 1.25 = 8.863548951 Simplifying x + 1.25 = 8.863548951 Reorder the terms: 1.25 + x = 8.863548951 Solving 1.25 + x = 8.863548951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 8.863548951 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 8.863548951 + -1.25 x = 8.863548951 + -1.25 Combine like terms: 8.863548951 + -1.25 = 7.613548951 x = 7.613548951 Simplifying x = 7.613548951

Subproblem 2

x + 1.25 = -8.863548951 Simplifying x + 1.25 = -8.863548951 Reorder the terms: 1.25 + x = -8.863548951 Solving 1.25 + x = -8.863548951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -8.863548951 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -8.863548951 + -1.25 x = -8.863548951 + -1.25 Combine like terms: -8.863548951 + -1.25 = -10.113548951 x = -10.113548951 Simplifying x = -10.113548951

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.613548951, -10.113548951}

See similar equations:

| 3-u=-4u | | 8y-10=4x+16 | | 3n+18=63 | | x-6=0.5x+7 | | 5x-51=-x+45 | | -3x+12=x-4 | | 5-q=-11 | | 3r+7=4r | | 9e^5x=81 | | 3/7(x-2=15 | | 60b^2=15 | | 6x^3+x+1=0 | | 8-m=5 | | -33-8x=-12x+63 | | 35=w+8 | | -4a^2+36a+80=0 | | c-3=2c | | 95=3x+35 | | 10=3(p+1)+1 | | -15x+60=-3x+36 | | -4b=-2b-8 | | -3(d+2)=18 | | -15c+18c-3c-4c+-13c=17 | | -w+8=-5w | | 8t+5=29 | | n+3n-7=25 | | 65-2x=78-3x | | 9+4=3x+4x-1 | | 3-2(x-9)=5 | | 400=5000x(4) | | x^3+4x^2-44x-96=0 | | -3=9+-4c |

Equations solver categories