x^2-3x=-40

Simple and best practice solution for x^2-3x=-40 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^2-3x=-40 equation:


Simplifying
x2 + -3x = -40

Reorder the terms:
-3x + x2 = -40

Solving
-3x + x2 = -40

Solving for variable 'x'.

Reorder the terms:
40 + -3x + x2 = -40 + 40

Combine like terms: -40 + 40 = 0
40 + -3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-40' to each side of the equation.
40 + -3x + -40 + x2 = 0 + -40

Reorder the terms:
40 + -40 + -3x + x2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -3x + x2 = 0 + -40
-3x + x2 = 0 + -40

Combine like terms: 0 + -40 = -40
-3x + x2 = -40

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -40 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -40 + 2.25

Combine like terms: -40 + 2.25 = -37.75
2.25 + -3x + x2 = -37.75

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = -37.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 2x-2+7x=7 | | 3m^2-16m-12=0 | | 6x-5=-5 | | 4(x-4)=5(x-3) | | 4(15-3x)=0 | | 26x+15=31x+10 | | 1.55t-2.85=8.4t+10.85 | | 26x-143=27x+72 | | 7-m=8-3m | | 3*(x+1)=4*(5-2*x) | | a^2+11a-51=0 | | -k/5=11 | | 3(2)+p(2)-7=11 | | 5x^2+15x-54.59815003=0 | | [k+6]=3 | | x^2-y^2=12 | | -6+x=-7 | | 4a=2 | | x^2+24-54.59815=0 | | x^2-y^2=124 | | x^2-y^2=93 | | -2.95(-4)= | | 7x^2-55x+72=0 | | x^2+24-e^4=0 | | 18x^3+24x^2-192x=0 | | 30=12-18 | | 5y-2y-1=3y-2 | | 0=.0119x^2-.308x-5.0003 | | 5x-25=3x-25 | | 3*x-9=7*x+2 | | 7k-13k= | | P^2=3p+10 |

Equations solver categories