5x^2+10x-16=0

Simple and best practice solution for 5x^2+10x-16=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+10x-16=0 equation:


Simplifying
5x2 + 10x + -16 = 0

Reorder the terms:
-16 + 10x + 5x2 = 0

Solving
-16 + 10x + 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'.
-3.2 + 2x + x2 = 0

Move the constant term to the right:

Add '3.2' to each side of the equation.
-3.2 + 2x + 3.2 + x2 = 0 + 3.2

Reorder the terms:
-3.2 + 3.2 + 2x + x2 = 0 + 3.2

Combine like terms: -3.2 + 3.2 = 0.0
0.0 + 2x + x2 = 0 + 3.2
2x + x2 = 0 + 3.2

Combine like terms: 0 + 3.2 = 3.2
2x + x2 = 3.2

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 3.2 + 1

Reorder the terms:
1 + 2x + x2 = 3.2 + 1

Combine like terms: 3.2 + 1 = 4.2
1 + 2x + x2 = 4.2

Factor a perfect square on the left side:
(x + 1)(x + 1) = 4.2

Calculate the square root of the right side: 2.049390153

Break this problem into two subproblems by setting 
(x + 1) equal to 2.049390153 and -2.049390153.

Subproblem 1

x + 1 = 2.049390153 Simplifying x + 1 = 2.049390153 Reorder the terms: 1 + x = 2.049390153 Solving 1 + x = 2.049390153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 2.049390153 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.049390153 + -1 x = 2.049390153 + -1 Combine like terms: 2.049390153 + -1 = 1.049390153 x = 1.049390153 Simplifying x = 1.049390153

Subproblem 2

x + 1 = -2.049390153 Simplifying x + 1 = -2.049390153 Reorder the terms: 1 + x = -2.049390153 Solving 1 + x = -2.049390153 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -2.049390153 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.049390153 + -1 x = -2.049390153 + -1 Combine like terms: -2.049390153 + -1 = -3.049390153 x = -3.049390153 Simplifying x = -3.049390153

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.049390153, -3.049390153}

See similar equations:

| -x-7=3x+25 | | 7(x+3)=2(-6-x) | | 9x^7-63x^6+45x^5= | | ((a+7)/(a+4))-1=((a+10)/(2a+8)) | | 16-5s=19 | | =w^2+30w+81 | | (5x)/(4-8x) | | 5(X+2)/2X-14X=10 | | 84=6x+2y | | (w-3)+(w+17)=68 | | 12p+7=2(p+8)+15 | | -5-6=3x+8-2zwhatisx | | -5-6=3x+8-2z | | 17+4x+4y= | | -(6a-7x)/2a+(8a-8x)/2a | | 1/2(t+3)=44 | | 2x-30+3x+20=180 | | -7/8k=-2/5 | | 8x^2+x+1=0 | | 5x+26=2x+11 | | 5x-3=30 | | (4m^2)(5m^2)= | | 2x+30+3x-20=180 | | 9-6-8+2-4= | | 4x^2+44x-75=0 | | (9-v)(2v-3)=0 | | 0=-4.9t^2+42t+10 | | 8x^3-17x^2-21=0 | | -2(1x+10)=-26 | | 5+39=5+3g | | 3(2x+2)-8=-2(x-3) | | 2(x-10/2)+10 |

Equations solver categories