5x^2+3x-7=0

Simple and best practice solution for 5x^2+3x-7=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 5x^2+3x-7=0 equation:


Simplifying
5x2 + 3x + -7 = 0

Reorder the terms:
-7 + 3x + 5x2 = 0

Solving
-7 + 3x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-1.4 + 0.6x + x2 = 0

Move the constant term to the right:

Add '1.4' to each side of the equation.
-1.4 + 0.6x + 1.4 + x2 = 0 + 1.4

Reorder the terms:
-1.4 + 1.4 + 0.6x + x2 = 0 + 1.4

Combine like terms: -1.4 + 1.4 = 0.0
0.0 + 0.6x + x2 = 0 + 1.4
0.6x + x2 = 0 + 1.4

Combine like terms: 0 + 1.4 = 1.4
0.6x + x2 = 1.4

The x term is 0.6x.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6x + 0.09 + x2 = 1.4 + 0.09

Reorder the terms:
0.09 + 0.6x + x2 = 1.4 + 0.09

Combine like terms: 1.4 + 0.09 = 1.49
0.09 + 0.6x + x2 = 1.49

Factor a perfect square on the left side:
(x + 0.3)(x + 0.3) = 1.49

Calculate the square root of the right side: 1.220655562

Break this problem into two subproblems by setting 
(x + 0.3) equal to 1.220655562 and -1.220655562.

Subproblem 1

x + 0.3 = 1.220655562 Simplifying x + 0.3 = 1.220655562 Reorder the terms: 0.3 + x = 1.220655562 Solving 0.3 + x = 1.220655562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = 1.220655562 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = 1.220655562 + -0.3 x = 1.220655562 + -0.3 Combine like terms: 1.220655562 + -0.3 = 0.920655562 x = 0.920655562 Simplifying x = 0.920655562

Subproblem 2

x + 0.3 = -1.220655562 Simplifying x + 0.3 = -1.220655562 Reorder the terms: 0.3 + x = -1.220655562 Solving 0.3 + x = -1.220655562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = -1.220655562 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = -1.220655562 + -0.3 x = -1.220655562 + -0.3 Combine like terms: -1.220655562 + -0.3 = -1.520655562 x = -1.520655562 Simplifying x = -1.520655562

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.920655562, -1.520655562}

See similar equations:

| 9x-8=8x-2 | | 2-6y+3=2y+11-6y | | 4z+8-2z=2+z+8 | | 44g=5g-8-g | | 5x^2+4x+10=0 | | -4x^2+24x+64=0 | | 6(x+3)+6=4x-6 | | 2a(9-5)+4(9-5)= | | x-15=-33 | | 3x+6=7x-50 | | 18-5=t | | 295=24n+35 | | 8w=5w+24 | | V^2+8v-75=0 | | xy-2x-3y+6=0 | | x=2(2.6-7) | | 25(10)=2x | | 9x-14-5x=-10+5x | | 77= | | 12(x-4)+6x=6 | | [22]= | | 5c+7f-10c+3f= | | -5*-9= | | 7.87=0.5x+5.33 | | 9(r-4)+18=0 | | (b-8)4=5(b+3) | | 6+5w=8 | | 7b^2-b=0 | | y=0.5(5)+5.33 | | 3(2y-7)=-5 | | y=0.5(3)+5.33 | | y=0.5(1)+5.33 |

Equations solver categories