x^2+0.2x-7=0

Simple and best practice solution for x^2+0.2x-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 x^2+0.2x-7=0 equation:


Simplifying
x2 + 0.2x + -7 = 0

Reorder the terms:
-7 + 0.2x + x2 = 0

Solving
-7 + 0.2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + 0.2x + 7 + x2 = 0 + 7

Reorder the terms:
-7 + 7 + 0.2x + x2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 0.2x + x2 = 0 + 7
0.2x + x2 = 0 + 7

Combine like terms: 0 + 7 = 7
0.2x + x2 = 7

The x term is 0.2x.  Take half its coefficient (0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
0.2x + 0.01 + x2 = 7 + 0.01

Reorder the terms:
0.01 + 0.2x + x2 = 7 + 0.01

Combine like terms: 7 + 0.01 = 7.01
0.01 + 0.2x + x2 = 7.01

Factor a perfect square on the left side:
(x + 0.1)(x + 0.1) = 7.01

Calculate the square root of the right side: 2.647640459

Break this problem into two subproblems by setting 
(x + 0.1) equal to 2.647640459 and -2.647640459.

Subproblem 1

x + 0.1 = 2.647640459 Simplifying x + 0.1 = 2.647640459 Reorder the terms: 0.1 + x = 2.647640459 Solving 0.1 + x = 2.647640459 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = 2.647640459 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = 2.647640459 + -0.1 x = 2.647640459 + -0.1 Combine like terms: 2.647640459 + -0.1 = 2.547640459 x = 2.547640459 Simplifying x = 2.547640459

Subproblem 2

x + 0.1 = -2.647640459 Simplifying x + 0.1 = -2.647640459 Reorder the terms: 0.1 + x = -2.647640459 Solving 0.1 + x = -2.647640459 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = -2.647640459 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = -2.647640459 + -0.1 x = -2.647640459 + -0.1 Combine like terms: -2.647640459 + -0.1 = -2.747640459 x = -2.747640459 Simplifying x = -2.747640459

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.547640459, -2.747640459}

See similar equations:

| 2x-24=-8(x-7) | | 7n^2=18+15n | | 9x^2+15=87 | | -p+4p=-18 | | (2x^2-3x+26)+(7x^2+6x-47)= | | x=3/2+1/2 | | (13b-7)-6(2b+2)=-6 | | -232+234=970 | | 1-7m-3=12 | | 0=-h-96t-16t | | x/3+1/2=x/4 | | 4x+1=2x+10 | | (20-x)/x=x | | 9x+5x+2+6=11x+4+2x | | x+7-2x=3 | | 20-x/x=x | | 2x-(8x-1)-15= | | 2w^2+16w+46=(w+7)(w+7) | | 30a+25b= | | 17(11x+9)= | | 2x^2+12=14x | | 23+4x=38 | | x+x+2=189.5 | | F(x)=-x^2+4x+9 | | 4w^2-w+10=0 | | 5v+1=-9-7v+2v | | m+4ifm=-9 | | 7x+4+2x+5=180 | | y=2/3*21-4 | | 22-3n=-5 | | 2(x+3)=3[x-(2-x)] | | (7x)(x)(5x)= |

Equations solver categories