5x^2+8x=19

Simple and best practice solution for 5x^2+8x=19 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+8x=19 equation:


Simplifying
5x2 + 8x = 19

Reorder the terms:
8x + 5x2 = 19

Solving
8x + 5x2 = 19

Solving for variable 'x'.

Reorder the terms:
-19 + 8x + 5x2 = 19 + -19

Combine like terms: 19 + -19 = 0
-19 + 8x + 5x2 = 0

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

Divide each side by '5'.
-3.8 + 1.6x + x2 = 0

Move the constant term to the right:

Add '3.8' to each side of the equation.
-3.8 + 1.6x + 3.8 + x2 = 0 + 3.8

Reorder the terms:
-3.8 + 3.8 + 1.6x + x2 = 0 + 3.8

Combine like terms: -3.8 + 3.8 = 0.0
0.0 + 1.6x + x2 = 0 + 3.8
1.6x + x2 = 0 + 3.8

Combine like terms: 0 + 3.8 = 3.8
1.6x + x2 = 3.8

The x term is 1.6x.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6x + 0.64 + x2 = 3.8 + 0.64

Reorder the terms:
0.64 + 1.6x + x2 = 3.8 + 0.64

Combine like terms: 3.8 + 0.64 = 4.44
0.64 + 1.6x + x2 = 4.44

Factor a perfect square on the left side:
(x + 0.8)(x + 0.8) = 4.44

Calculate the square root of the right side: 2.107130751

Break this problem into two subproblems by setting 
(x + 0.8) equal to 2.107130751 and -2.107130751.

Subproblem 1

x + 0.8 = 2.107130751 Simplifying x + 0.8 = 2.107130751 Reorder the terms: 0.8 + x = 2.107130751 Solving 0.8 + x = 2.107130751 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = 2.107130751 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = 2.107130751 + -0.8 x = 2.107130751 + -0.8 Combine like terms: 2.107130751 + -0.8 = 1.307130751 x = 1.307130751 Simplifying x = 1.307130751

Subproblem 2

x + 0.8 = -2.107130751 Simplifying x + 0.8 = -2.107130751 Reorder the terms: 0.8 + x = -2.107130751 Solving 0.8 + x = -2.107130751 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8' to each side of the equation. 0.8 + -0.8 + x = -2.107130751 + -0.8 Combine like terms: 0.8 + -0.8 = 0.0 0.0 + x = -2.107130751 + -0.8 x = -2.107130751 + -0.8 Combine like terms: -2.107130751 + -0.8 = -2.907130751 x = -2.907130751 Simplifying x = -2.907130751

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.307130751, -2.907130751}

See similar equations:

| X+7=4(3x-2) | | 9-9x=45-16x | | 134x-(120000+82x)=560000 | | 5(8-3n)+5n=40+20n | | 9y=2x | | G=4(x+9)-(7+x)(x+1) | | (4b^3+9b^2-6)+(3b^3-9b+8)= | | Y+9=-2 | | 8(6x-1)=6x+1 | | -(6y+1)-(5y-8)=1 | | -79-10x=7*23 | | u-3u=10+8 | | y=-11+6x | | 8+5m-1=9m+11-3 | | 8v=-7 | | 3(x+2)+2(3x+2)=28 | | 2(4-2x+x^2)-x(x+2)= | | 33x-10-17x=4(4x-3)+2 | | 1+3n-5n=12 | | 6r-4r=16 | | 8x+14x=132 | | 16x^2+38x-5=0 | | (3x+5)-(-7x+8)= | | 2y-3x=0 | | 5(3+6x)-5=70 | | -7g=49 | | 4(4x+2)=20-2(x-3) | | x^4-81-x^3+9=0 | | -7(3-x+3)=-18 | | 58q-2.8-5.2q=-0.4-2.2 | | 2x^2-24x+81=0 | | 14x^2+40x-6=0 |

Equations solver categories