3x^2-12x=-15

Simple and best practice solution for 3x^2-12x=-15 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 3x^2-12x=-15 equation:


Simplifying
3x2 + -12x = -15

Reorder the terms:
-12x + 3x2 = -15

Solving
-12x + 3x2 = -15

Solving for variable 'x'.

Reorder the terms:
15 + -12x + 3x2 = -15 + 15

Combine like terms: -15 + 15 = 0
15 + -12x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(5 + -4x + x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(5 + -4x + x2)' equal to zero and attempt to solve: Simplifying 5 + -4x + x2 = 0 Solving 5 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-5' to each side of the equation. 5 + -4x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + -4x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4x + x2 = 0 + -5 -4x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 -4x + x2 = -5 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = -5 + 4 Reorder the terms: 4 + -4x + x2 = -5 + 4 Combine like terms: -5 + 4 = -1 4 + -4x + x2 = -1 Factor a perfect square on the left side: (x + -2)(x + -2) = -1 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

See similar equations:

| c=6(y+2) | | 4m+2m=5 | | -9-5(-8x+6)=3 | | 2x-1/3=1/5=x | | 4x=7(3+x) | | -3(-4x+6)=-1 | | 20.4r=71 | | X+x(.2)=60 | | 2y+15+3y-5=180 | | 7/9-(-5/9) | | 6n=31 | | 2x-1/3=1/5=0 | | 6.4a=7.2 | | 5+2x=26 | | 4(-8x-3)-5x=2 | | 2x^7-6x^6-20x^5=0 | | 20f+(-8f)-15=3(4f-5) | | 6.845x-5.2=8.107 | | -9times-90=-243 | | 2x-1/3=1//5-x | | -x+4+20x=156 | | 5(u+6)(u+6)=60 | | 4(cos^2)x+11(cosx)-7=0 | | -9-90=-243 | | x^14-y^4=0 | | 3x^2+20x+49=0 | | 10-2n=24 | | (2x^2+6x)-(14x-42)=(2x+6)(x-7) | | 82b-12=23 | | -2(X-9)=-8(X-3) | | (0.9-1.1)10=(0.3+0.2x)10 | | (u-4)(u-4)+8=0 |

Equations solver categories