2x+15=3x^2

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


Simplifying
2x + 15 = 3x2

Reorder the terms:
15 + 2x = 3x2

Solving
15 + 2x = 3x2

Solving for variable 'x'.

Combine like terms: 3x2 + -3x2 = 0
15 + 2x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-5 + -0.6666666667x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -0.6666666667x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -0.6666666667x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -0.6666666667x + x2 = 0 + 5
-0.6666666667x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-0.6666666667x + x2 = 5

The x term is -0.6666666667x.  Take half its coefficient (-0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
-0.6666666667x + 0.1111111112 + x2 = 5 + 0.1111111112

Reorder the terms:
0.1111111112 + -0.6666666667x + x2 = 5 + 0.1111111112

Combine like terms: 5 + 0.1111111112 = 5.1111111112
0.1111111112 + -0.6666666667x + x2 = 5.1111111112

Factor a perfect square on the left side:
(x + -0.3333333334)(x + -0.3333333334) = 5.1111111112

Calculate the square root of the right side: 2.260776661

Break this problem into two subproblems by setting 
(x + -0.3333333334) equal to 2.260776661 and -2.260776661.

Subproblem 1

x + -0.3333333334 = 2.260776661 Simplifying x + -0.3333333334 = 2.260776661 Reorder the terms: -0.3333333334 + x = 2.260776661 Solving -0.3333333334 + x = 2.260776661 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = 2.260776661 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = 2.260776661 + 0.3333333334 x = 2.260776661 + 0.3333333334 Combine like terms: 2.260776661 + 0.3333333334 = 2.5941099944 x = 2.5941099944 Simplifying x = 2.5941099944

Subproblem 2

x + -0.3333333334 = -2.260776661 Simplifying x + -0.3333333334 = -2.260776661 Reorder the terms: -0.3333333334 + x = -2.260776661 Solving -0.3333333334 + x = -2.260776661 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = -2.260776661 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = -2.260776661 + 0.3333333334 x = -2.260776661 + 0.3333333334 Combine like terms: -2.260776661 + 0.3333333334 = -1.9274433276 x = -1.9274433276 Simplifying x = -1.9274433276

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.5941099944, -1.9274433276}

See similar equations:

| 15-u=200 | | 2x-1=96 | | (2x-5)-5=4+5 | | 2(1+3)=8 | | 4.00+0.50n= | | 139-y=218 | | 4r^2-12r+25=0 | | 170=38-v | | 3(x+4)=6(x+2) | | 4v-14=22 | | 8+18s-3=9s+109-4s | | 60-222= | | x^2+2xy+y^2+10=0 | | B+4=2(5-b) | | -18=2(u-6) | | 3(w-87)=33 | | sin70=85/n | | 6(j-84)=90 | | ((1-4t^2)/(t^2))(t/(1-t)) | | 7z-2z=-20 | | 8x-5=4+7x | | q=22-.5(20-.5q) | | 2+3(y-1)=23 | | 15=g/4=14 | | 15=g/4=1 | | x/1.4=3 | | ab=-18+48 | | 7y^2-3y=4 | | -18=-8+2y | | 6(9-2x)=-12x-18 | | 4(x-3)-7x=-18 | | 2(3y-17)=16 |

Equations solver categories