5x^2+16x-2=0

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


Simplifying
5x2 + 16x + -2 = 0

Reorder the terms:
-2 + 16x + 5x2 = 0

Solving
-2 + 16x + 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'.
-0.4 + 3.2x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + 3.2x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + 3.2x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 3.2x + x2 = 0 + 0.4
3.2x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
3.2x + x2 = 0.4

The x term is 3.2x.  Take half its coefficient (1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
3.2x + 2.56 + x2 = 0.4 + 2.56

Reorder the terms:
2.56 + 3.2x + x2 = 0.4 + 2.56

Combine like terms: 0.4 + 2.56 = 2.96
2.56 + 3.2x + x2 = 2.96

Factor a perfect square on the left side:
(x + 1.6)(x + 1.6) = 2.96

Calculate the square root of the right side: 1.720465053

Break this problem into two subproblems by setting 
(x + 1.6) equal to 1.720465053 and -1.720465053.

Subproblem 1

x + 1.6 = 1.720465053 Simplifying x + 1.6 = 1.720465053 Reorder the terms: 1.6 + x = 1.720465053 Solving 1.6 + x = 1.720465053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = 1.720465053 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = 1.720465053 + -1.6 x = 1.720465053 + -1.6 Combine like terms: 1.720465053 + -1.6 = 0.120465053 x = 0.120465053 Simplifying x = 0.120465053

Subproblem 2

x + 1.6 = -1.720465053 Simplifying x + 1.6 = -1.720465053 Reorder the terms: 1.6 + x = -1.720465053 Solving 1.6 + x = -1.720465053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = -1.720465053 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = -1.720465053 + -1.6 x = -1.720465053 + -1.6 Combine like terms: -1.720465053 + -1.6 = -3.320465053 x = -3.320465053 Simplifying x = -3.320465053

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.120465053, -3.320465053}

See similar equations:

| 3(x+10)-x=34 | | x+2x+12=3(x+4) | | 3x^2+6x-47=8 | | 6x-10=4(x-1) | | -w+138=218 | | s-8=13 | | 254-y=151 | | 2sin^2(x)+5sin(x)+3=0 | | 4x(5x+9)= | | 3(2m+6)=6m+18 | | 3X+4Y=3.5 | | 6y-5=-3y+9y | | 34=2v | | 5x+4=-76 | | -10=4w-6 | | 3y=4x-18 | | ln(x)=18-x | | lnx=18-x | | z+4z=4+3i+11+18i | | -4(b-12)=-20 | | -10x-4=-8x+2 | | G=15+2 | | -24+r=-27 | | 20x+203=-302 | | -8x=-57 | | -3t=27 | | 4x=x^2-32 | | X-3-(x-5)+2x=6 | | s-7=6 | | -3+4u=21 | | 3t+2t=10 | | 2p+3.1=0.14 |

Equations solver categories