3x^2-12x-27=0

Simple and best practice solution for 3x^2-12x-27=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 3x^2-12x-27=0 equation:


Simplifying
3x2 + -12x + -27 = 0

Reorder the terms:
-27 + -12x + 3x2 = 0

Solving
-27 + -12x + 3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-9 + -4x + x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-9 + -4x + x2)' equal to zero and attempt to solve: Simplifying -9 + -4x + x2 = 0 Solving -9 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '9' to each side of the equation. -9 + -4x + 9 + x2 = 0 + 9 Reorder the terms: -9 + 9 + -4x + x2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -4x + x2 = 0 + 9 -4x + x2 = 0 + 9 Combine like terms: 0 + 9 = 9 -4x + x2 = 9 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 = 9 + 4 Reorder the terms: 4 + -4x + x2 = 9 + 4 Combine like terms: 9 + 4 = 13 4 + -4x + x2 = 13 Factor a perfect square on the left side: (x + -2)(x + -2) = 13 Calculate the square root of the right side: 3.605551275 Break this problem into two subproblems by setting (x + -2) equal to 3.605551275 and -3.605551275.

Subproblem 1

x + -2 = 3.605551275 Simplifying x + -2 = 3.605551275 Reorder the terms: -2 + x = 3.605551275 Solving -2 + x = 3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 3.605551275 + 2 Combine like terms: -2 + 2 = 0 0 + x = 3.605551275 + 2 x = 3.605551275 + 2 Combine like terms: 3.605551275 + 2 = 5.605551275 x = 5.605551275 Simplifying x = 5.605551275

Subproblem 2

x + -2 = -3.605551275 Simplifying x + -2 = -3.605551275 Reorder the terms: -2 + x = -3.605551275 Solving -2 + x = -3.605551275 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -3.605551275 + 2 Combine like terms: -2 + 2 = 0 0 + x = -3.605551275 + 2 x = -3.605551275 + 2 Combine like terms: -3.605551275 + 2 = -1.605551275 x = -1.605551275 Simplifying x = -1.605551275

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.605551275, -1.605551275}

Solution

x = {5.605551275, -1.605551275}

See similar equations:

| x+17=2(3x+1) | | 16=4(6x+3) | | 3x^2+6X+27=0 | | x=x^2-5x+9 | | 6x+4x-10=0 | | (5+3i)x-(2+5i)y=11-i | | (7+w)(5w+9)=0 | | -5(n-6)=n+18 | | 10*6=x | | 0=(5y-2)(5y+2) | | y^3+4y^2-36y-144=0 | | 4x^2-19x-5x=0 | | 40y^2+2y-2= | | 3x^4-81=0 | | 4w^3+3w^8-28w-21=0 | | y^4=36 | | 7(x+4)=6(x-5)+x | | 10+2p=p+7 | | 0=2x^3-2 | | (3+y)(4y+9)=0 | | 7+(-11)=0 | | (u+1)(u-8)=0 | | 8(4-x)+6p=-5k-11yx | | 8x^3=8x^2-6x | | 9u^2-49=0 | | 1/15(a+5)=1/9(4-a) | | -5-7-3f=-2(f+6) | | 3x^3+18x^2+27x= | | 11x^2-7x-40=0 | | 5w^5-30w^4+55w^3=0 | | y^4+21y^2-100=0 | | 1.6=2y |

Equations solver categories