3x^2=3-7x

Simple and best practice solution for 3x^2=3-7x 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=3-7x equation:


Simplifying
3x2 = 3 + -7x

Solving
3x2 = 3 + -7x

Solving for variable 'x'.

Reorder the terms:
-3 + 7x + 3x2 = 3 + -7x + -3 + 7x

Reorder the terms:
-3 + 7x + 3x2 = 3 + -3 + -7x + 7x

Combine like terms: 3 + -3 = 0
-3 + 7x + 3x2 = 0 + -7x + 7x
-3 + 7x + 3x2 = -7x + 7x

Combine like terms: -7x + 7x = 0
-3 + 7x + 3x2 = 0

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

Divide each side by '3'.
-1 + 2.333333333x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 2.333333333x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 2.333333333x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2.333333333x + x2 = 0 + 1
2.333333333x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
2.333333333x + x2 = 1

The x term is 2.333333333x.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333x + 1.361111112 + x2 = 1 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333x + x2 = 1 + 1.361111112

Combine like terms: 1 + 1.361111112 = 2.361111112
1.361111112 + 2.333333333x + x2 = 2.361111112

Factor a perfect square on the left side:
(x + 1.166666667)(x + 1.166666667) = 2.361111112

Calculate the square root of the right side: 1.536590743

Break this problem into two subproblems by setting 
(x + 1.166666667) equal to 1.536590743 and -1.536590743.

Subproblem 1

x + 1.166666667 = 1.536590743 Simplifying x + 1.166666667 = 1.536590743 Reorder the terms: 1.166666667 + x = 1.536590743 Solving 1.166666667 + x = 1.536590743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = 1.536590743 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = 1.536590743 + -1.166666667 x = 1.536590743 + -1.166666667 Combine like terms: 1.536590743 + -1.166666667 = 0.369924076 x = 0.369924076 Simplifying x = 0.369924076

Subproblem 2

x + 1.166666667 = -1.536590743 Simplifying x + 1.166666667 = -1.536590743 Reorder the terms: 1.166666667 + x = -1.536590743 Solving 1.166666667 + x = -1.536590743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = -1.536590743 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = -1.536590743 + -1.166666667 x = -1.536590743 + -1.166666667 Combine like terms: -1.536590743 + -1.166666667 = -2.70325741 x = -2.70325741 Simplifying x = -2.70325741

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.369924076, -2.70325741}

See similar equations:

| 5x-6-7x=x+6+x | | 8/9=-1/3w-7/6 | | 9/7-9/2w=-9/5 | | 56+x=10 | | 3w-6=426 | | m^2-4m+3= | | 6+28/4+3*4 | | -3X+7y=-18 | | 6+28/4+3x4 | | 3x-6+13x-6=180 | | 4b+7=25 | | 4x^2+3x=9 | | 4[6-(-5x-6)]=40x+72 | | 3(w+7)=-3(7w-1)+9w | | 7c*6e= | | 8x+10y=48 | | 5a/4-2a/5=17/2 | | 2(x-3)-3=-4(-5x+3)-3x | | 3x+7-5(x-1)=5x+4 | | 8r+10y=48 | | 8x-9-6x+14=11x-9-10+13 | | -7.24=x/4+3 | | a*2/(4+6)=10 | | 15x^2+19m+6=0 | | -5x+15.8=3.3 | | 3-4(5-7)=z | | Z+6/8=Z-5/7 | | -3(3v-7)+7v=6+3(2v-1) | | -1.1+u/2=-13.9 | | 6=-19+t | | 7(x+4)=-3(x+2)+4 | | 5+2u=19 |

Equations solver categories