-3x(x+3)=5x+6

Simple and best practice solution for -3x(x+3)=5x+6 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(x+3)=5x+6 equation:


Simplifying
-3x(x + 3) = 5x + 6

Reorder the terms:
-3x(3 + x) = 5x + 6
(3 * -3x + x * -3x) = 5x + 6
(-9x + -3x2) = 5x + 6

Reorder the terms:
-9x + -3x2 = 6 + 5x

Solving
-9x + -3x2 = 6 + 5x

Solving for variable 'x'.

Reorder the terms:
-6 + -9x + -5x + -3x2 = 6 + 5x + -6 + -5x

Combine like terms: -9x + -5x = -14x
-6 + -14x + -3x2 = 6 + 5x + -6 + -5x

Reorder the terms:
-6 + -14x + -3x2 = 6 + -6 + 5x + -5x

Combine like terms: 6 + -6 = 0
-6 + -14x + -3x2 = 0 + 5x + -5x
-6 + -14x + -3x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-6 + -14x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(6 + 14x + 3x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(6 + 14x + 3x2)' equal to zero and attempt to solve: Simplifying 6 + 14x + 3x2 = 0 Solving 6 + 14x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 2 + 4.666666667x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + 4.666666667x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + 4.666666667x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 4.666666667x + x2 = 0 + -2 4.666666667x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 4.666666667x + x2 = -2 The x term is 4.666666667x. Take half its coefficient (2.333333334). Square it (5.444444448) and add it to both sides. Add '5.444444448' to each side of the equation. 4.666666667x + 5.444444448 + x2 = -2 + 5.444444448 Reorder the terms: 5.444444448 + 4.666666667x + x2 = -2 + 5.444444448 Combine like terms: -2 + 5.444444448 = 3.444444448 5.444444448 + 4.666666667x + x2 = 3.444444448 Factor a perfect square on the left side: (x + 2.333333334)(x + 2.333333334) = 3.444444448 Calculate the square root of the right side: 1.855921455 Break this problem into two subproblems by setting (x + 2.333333334) equal to 1.855921455 and -1.855921455.

Subproblem 1

x + 2.333333334 = 1.855921455 Simplifying x + 2.333333334 = 1.855921455 Reorder the terms: 2.333333334 + x = 1.855921455 Solving 2.333333334 + x = 1.855921455 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = 1.855921455 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = 1.855921455 + -2.333333334 x = 1.855921455 + -2.333333334 Combine like terms: 1.855921455 + -2.333333334 = -0.477411879 x = -0.477411879 Simplifying x = -0.477411879

Subproblem 2

x + 2.333333334 = -1.855921455 Simplifying x + 2.333333334 = -1.855921455 Reorder the terms: 2.333333334 + x = -1.855921455 Solving 2.333333334 + x = -1.855921455 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = -1.855921455 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = -1.855921455 + -2.333333334 x = -1.855921455 + -2.333333334 Combine like terms: -1.855921455 + -2.333333334 = -4.189254789 x = -4.189254789 Simplifying x = -4.189254789

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.477411879, -4.189254789}

Solution

x = {-0.477411879, -4.189254789}

See similar equations:

| 6k^2+45k+81=0 | | 8u+6u+4+1= | | 3(2x-4)=7(x-2) | | 3(x+2)+11=24 | | 2p-5(p+4)=36 | | p=5m+v | | -8x-9=6 | | 2p-5(9+4)=36 | | 0.5x+0.25(70)=44.5 | | -40=2(x-28) | | sqrt(5+y^2)dx+4(x^2*y+y)dy=0 | | u/12=9 | | 8p+18-p-24=5p | | 12x-b=m | | 95.2/14=6.8 | | 12x+4=9x+22 | | 8x-7(x-2)=14 | | f(x)=x^5-8x^4+18x^3+12x^2-88x+80 | | 19=u/2-16 | | 5x+2=-13+2x | | v-28=505 | | 8-3n=4+3n | | x-y=0.6 | | 5(4x-3y+6)= | | 6x+15=2x+183 | | 435=5s | | 5(x-5)=7x-34 | | F/5-22=-2 | | 665=7p | | 8x^3+15x^2-9x-14=0 | | 7×2/3 | | 10s+5s=125 |

Equations solver categories