3=x(x+3.75)

Simple and best practice solution for 3=x(x+3.75) 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 3=x(x+3.75) equation:


Simplifying
3 = x(x + 3.75)

Reorder the terms:
3 = x(3.75 + x)
3 = (3.75 * x + x * x)
3 = (3.75x + x2)

Solving
3 = 3.75x + x2

Solving for variable 'x'.

Reorder the terms:
3 + -3.75x + -1x2 = 3.75x + -3.75x + x2 + -1x2

Combine like terms: 3.75x + -3.75x = 0.00
3 + -3.75x + -1x2 = 0.00 + x2 + -1x2
3 + -3.75x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
3 + -3.75x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-3 + 3.75x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 3.75x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 3.75x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 3.75x + x2 = 0 + 3
3.75x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
3.75x + x2 = 3

The x term is 3.75x.  Take half its coefficient (1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
3.75x + 3.515625 + x2 = 3 + 3.515625

Reorder the terms:
3.515625 + 3.75x + x2 = 3 + 3.515625

Combine like terms: 3 + 3.515625 = 6.515625
3.515625 + 3.75x + x2 = 6.515625

Factor a perfect square on the left side:
(x + 1.875)(x + 1.875) = 6.515625

Calculate the square root of the right side: 2.552572232

Break this problem into two subproblems by setting 
(x + 1.875) equal to 2.552572232 and -2.552572232.

Subproblem 1

x + 1.875 = 2.552572232 Simplifying x + 1.875 = 2.552572232 Reorder the terms: 1.875 + x = 2.552572232 Solving 1.875 + x = 2.552572232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = 2.552572232 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = 2.552572232 + -1.875 x = 2.552572232 + -1.875 Combine like terms: 2.552572232 + -1.875 = 0.677572232 x = 0.677572232 Simplifying x = 0.677572232

Subproblem 2

x + 1.875 = -2.552572232 Simplifying x + 1.875 = -2.552572232 Reorder the terms: 1.875 + x = -2.552572232 Solving 1.875 + x = -2.552572232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = -2.552572232 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = -2.552572232 + -1.875 x = -2.552572232 + -1.875 Combine like terms: -2.552572232 + -1.875 = -4.427572232 x = -4.427572232 Simplifying x = -4.427572232

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.677572232, -4.427572232}

See similar equations:

| (4)(4)=16 | | (x+2)(x^2-5x-36)=0 | | (x+7)+x=15 | | -7(x+4)+1=-5(x+7) | | -y+13=-40 | | -4(1-2v)=6(v-3) | | 6(4+2m)=-6+6m | | -m-22=5(m-8) | | -2b+12=5b-4b | | x^2-22x-10= | | -18=-14+y | | 8y*8y=64 | | n+7=1+3n | | 100[0.05](x+2)= | | 7x*5x=35 | | 5(9x+4)= | | 85=-5(3+4n) | | 3t+15-12= | | 9(7x+9)= | | -254=-4(8-7r)+2 | | -m-6m=7 | | 6x^2-12x-144=0 | | -m-6m=00 | | 209=140-x | | x+3+x+3=1000 | | 2(6x+20)-91=300-5(4x+6)+1 | | 8+3x-4x=6 | | 7*5y=35 | | 4(3-x)=24 | | 12x+51=300-20x+31 | | 7x+42+6x=x^2+6x | | y^2-4xy+4x^2=0 |

Equations solver categories