x^2+3x=972

Simple and best practice solution for x^2+3x=972 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 x^2+3x=972 equation:


Simplifying
x2 + 3x = 972

Reorder the terms:
3x + x2 = 972

Solving
3x + x2 = 972

Solving for variable 'x'.

Reorder the terms:
-972 + 3x + x2 = 972 + -972

Combine like terms: 972 + -972 = 0
-972 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '972' to each side of the equation.
-972 + 3x + 972 + x2 = 0 + 972

Reorder the terms:
-972 + 972 + 3x + x2 = 0 + 972

Combine like terms: -972 + 972 = 0
0 + 3x + x2 = 0 + 972
3x + x2 = 0 + 972

Combine like terms: 0 + 972 = 972
3x + x2 = 972

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 972 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 972 + 2.25

Combine like terms: 972 + 2.25 = 974.25
2.25 + 3x + x2 = 974.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 974.25

Calculate the square root of the right side: 31.21297807

Break this problem into two subproblems by setting 
(x + 1.5) equal to 31.21297807 and -31.21297807.

Subproblem 1

x + 1.5 = 31.21297807 Simplifying x + 1.5 = 31.21297807 Reorder the terms: 1.5 + x = 31.21297807 Solving 1.5 + x = 31.21297807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 31.21297807 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 31.21297807 + -1.5 x = 31.21297807 + -1.5 Combine like terms: 31.21297807 + -1.5 = 29.71297807 x = 29.71297807 Simplifying x = 29.71297807

Subproblem 2

x + 1.5 = -31.21297807 Simplifying x + 1.5 = -31.21297807 Reorder the terms: 1.5 + x = -31.21297807 Solving 1.5 + x = -31.21297807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -31.21297807 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -31.21297807 + -1.5 x = -31.21297807 + -1.5 Combine like terms: -31.21297807 + -1.5 = -32.71297807 x = -32.71297807 Simplifying x = -32.71297807

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.71297807, -32.71297807}

See similar equations:

| 4[2k+3]-2=6 | | 2x+3(1-3x)= | | 9/2x=4/x-1/14 | | x^2+3x=927 | | sqrt(5x)=sqrt(7x+9)-3 | | 6(-5x+12)=54-28x | | 14.7= | | 2w^2-8w-179=0 | | 7(x-5)+5x=4(3x+5)-9 | | x^2-8n+20=5 | | (X-4)2+5=-20 | | 6x-17=x-3 | | 4y^2-63y-81=0 | | N+0.15=1.25 | | -3x^3+x^2+7x-5=0 | | 3+6*2+8-2+9= | | C^4-2x^3+3=0 | | -3+14=4x-7 | | 0.33[2c-5]+3=7 | | 0=-picosx | | -5.2(4x+6)-1.7(3x-5)= | | -7/3=-3/7y | | -x-14=29 | | w(2w-8)=179 | | 100*q=3.1975 | | 6x^2+10x-9x=15 | | 13y-17y=12-36 | | 4.50x=3.70x+4 | | 3x=(x+1)(x+2)-3 | | 6x-(4x+3)=13 | | 0.3(X-0.7)=1.9-0.2(0.4-X) | | 4.40x=3.7x+4 |

Equations solver categories