1-x^2-3x=0

Simple and best practice solution for 1-x^2-3x=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 1-x^2-3x=0 equation:


Simplifying
1 + -1x2 + -3x = 0

Reorder the terms:
1 + -3x + -1x2 = 0

Solving
1 + -3x + -1x2 = 0

Solving for variable 'x'.

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

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

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 3x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 3x + x2 = 0 + 1

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

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

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 = 1 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 1 + 2.25

Combine like terms: 1 + 2.25 = 3.25
2.25 + 3x + x2 = 3.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(x + 1.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + 1.5 = 1.802775638 Simplifying x + 1.5 = 1.802775638 Reorder the terms: 1.5 + x = 1.802775638 Solving 1.5 + x = 1.802775638 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 = 1.802775638 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 1.802775638 + -1.5 x = 1.802775638 + -1.5 Combine like terms: 1.802775638 + -1.5 = 0.302775638 x = 0.302775638 Simplifying x = 0.302775638

Subproblem 2

x + 1.5 = -1.802775638 Simplifying x + 1.5 = -1.802775638 Reorder the terms: 1.5 + x = -1.802775638 Solving 1.5 + x = -1.802775638 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 = -1.802775638 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -1.802775638 + -1.5 x = -1.802775638 + -1.5 Combine like terms: -1.802775638 + -1.5 = -3.302775638 x = -3.302775638 Simplifying x = -3.302775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.302775638, -3.302775638}

See similar equations:

| -3(u-8)=6u-48 | | (2x-3)(x-2)=10 | | 4(x+2)+3(2x-5)=13 | | y=8.3(10)+479 | | M-14=-50 | | 1/25(16-4q)=8/25q-4/5 | | 4(2p-7)-(p+7)-2(p+6)=-77 | | G+5=-12 | | 6p=4p+2 | | 5x+5y+13=0 | | 48/22-25/5 | | -4[(3p+3)-(6p-1)]=8(5-p)-2 | | 4(q-2)+2(q+4)=6 | | -9n-5=-10n-12 | | 4(4z+4)-16(z+3)=-z-7(z+8) | | 12x-12=9x | | 4(4z+4)-16(z+3)=-z-(z+8) | | 6+3(x)=0 | | v+16=2v-20 | | K=-7+15 | | 3+3+3(-2)= | | (Ln(x))=5+x | | ln(x)=5+x | | 3+3+3x=0 | | p=96 | | 4cos^2(x)+4sin^2(2x)= | | -20x^2+75x+175=0 | | -3m-10=4m | | -13=n+-39 | | 18x/15=36/15 | | 4x-26=60+2x | | 7+4x=0 |

Equations solver categories