3x^2+2x-147=0

Simple and best practice solution for 3x^2+2x-147=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+2x-147=0 equation:


Simplifying
3x2 + 2x + -147 = 0

Reorder the terms:
-147 + 2x + 3x2 = 0

Solving
-147 + 2x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-49 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + 0.6666666667x + 49 + x2 = 0 + 49

Reorder the terms:
-49 + 49 + 0.6666666667x + x2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 0.6666666667x + x2 = 0 + 49
0.6666666667x + x2 = 0 + 49

Combine like terms: 0 + 49 = 49
0.6666666667x + x2 = 49

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 = 49 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 49 + 0.1111111112

Combine like terms: 49 + 0.1111111112 = 49.1111111112
0.1111111112 + 0.6666666667x + x2 = 49.1111111112

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 49.1111111112

Calculate the square root of the right side: 7.007932014

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 7.007932014 and -7.007932014.

Subproblem 1

x + 0.3333333334 = 7.007932014 Simplifying x + 0.3333333334 = 7.007932014 Reorder the terms: 0.3333333334 + x = 7.007932014 Solving 0.3333333334 + x = 7.007932014 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 = 7.007932014 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 7.007932014 + -0.3333333334 x = 7.007932014 + -0.3333333334 Combine like terms: 7.007932014 + -0.3333333334 = 6.6745986806 x = 6.6745986806 Simplifying x = 6.6745986806

Subproblem 2

x + 0.3333333334 = -7.007932014 Simplifying x + 0.3333333334 = -7.007932014 Reorder the terms: 0.3333333334 + x = -7.007932014 Solving 0.3333333334 + x = -7.007932014 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 = -7.007932014 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -7.007932014 + -0.3333333334 x = -7.007932014 + -0.3333333334 Combine like terms: -7.007932014 + -0.3333333334 = -7.3412653474 x = -7.3412653474 Simplifying x = -7.3412653474

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.6745986806, -7.3412653474}

See similar equations:

| 5x-2=7-3x | | 2s^2+3s=2 | | 4x-1=6+1x | | f(x)=6x^2-2 | | 4x^2+6xy+8xy^2=0 | | X^4-49x^2+36x+252=0 | | 9x^9-4x^7+13x^6= | | 2-4y=38-5y | | 5x^2-8x-45=0 | | 11x+7y+3w=6x | | y=x-12x+8 | | (w*1)+[(1-w)*11]=1.95 | | y=((2/3)-3t) | | X^2+12-1=0 | | 8x+5x=12x | | 50x+5y=18z | | 3x+220=5(x+40) | | 8-(90/(6*5)-3)*25=x | | 8-(90/(6*5)-3)*5=x | | 1+2x+7y+4z=45 | | 8-[90/(6*5)-3]*5=x | | -1.7+2.1z=-5.9 | | (7-4+9)= | | (7-4+9)2=x | | (5x-2y+7)dy+(4x-3y+8)dx= | | 5(9x-6)=-3 | | 6(10x+7x)=1 | | x^2+24-2=0 | | 4x^4+9x^3+18x^2+6x+5=0 | | 4d+3e-9f=34 | | 200=3x^2-205+2x^2 | | (5rs^2)(-2r^3s^4)= |

Equations solver categories