9.3=-.01x^2+.29x+8.1

Simple and best practice solution for 9.3=-.01x^2+.29x+8.1 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 9.3=-.01x^2+.29x+8.1 equation:


Simplifying
9.3 = -0.01x2 + 0.29x + 8.1

Reorder the terms:
9.3 = 8.1 + 0.29x + -0.01x2

Solving
9.3 = 8.1 + 0.29x + -0.01x2

Solving for variable 'x'.

Combine like terms: 9.3 + -8.1 = 1.2
1.2 + -0.29x + 0.01x2 = 8.1 + 0.29x + -0.01x2 + -8.1 + -0.29x + 0.01x2

Reorder the terms:
1.2 + -0.29x + 0.01x2 = 8.1 + -8.1 + 0.29x + -0.29x + -0.01x2 + 0.01x2

Combine like terms: 8.1 + -8.1 = 0.0
1.2 + -0.29x + 0.01x2 = 0.0 + 0.29x + -0.29x + -0.01x2 + 0.01x2
1.2 + -0.29x + 0.01x2 = 0.29x + -0.29x + -0.01x2 + 0.01x2

Combine like terms: 0.29x + -0.29x = 0.00
1.2 + -0.29x + 0.01x2 = 0.00 + -0.01x2 + 0.01x2
1.2 + -0.29x + 0.01x2 = -0.01x2 + 0.01x2

Combine like terms: -0.01x2 + 0.01x2 = 0.00
1.2 + -0.29x + 0.01x2 = 0.00

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

Divide each side by '0.01'.
120 + -29x + x2 = 0

Move the constant term to the right:

Add '-120' to each side of the equation.
120 + -29x + -120 + x2 = 0 + -120

Reorder the terms:
120 + -120 + -29x + x2 = 0 + -120

Combine like terms: 120 + -120 = 0
0 + -29x + x2 = 0 + -120
-29x + x2 = 0 + -120

Combine like terms: 0 + -120 = -120
-29x + x2 = -120

The x term is -29x.  Take half its coefficient (-14.5).
Square it (210.25) and add it to both sides.

Add '210.25' to each side of the equation.
-29x + 210.25 + x2 = -120 + 210.25

Reorder the terms:
210.25 + -29x + x2 = -120 + 210.25

Combine like terms: -120 + 210.25 = 90.25
210.25 + -29x + x2 = 90.25

Factor a perfect square on the left side:
(x + -14.5)(x + -14.5) = 90.25

Calculate the square root of the right side: 9.5

Break this problem into two subproblems by setting 
(x + -14.5) equal to 9.5 and -9.5.

Subproblem 1

x + -14.5 = 9.5 Simplifying x + -14.5 = 9.5 Reorder the terms: -14.5 + x = 9.5 Solving -14.5 + x = 9.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14.5' to each side of the equation. -14.5 + 14.5 + x = 9.5 + 14.5 Combine like terms: -14.5 + 14.5 = 0.0 0.0 + x = 9.5 + 14.5 x = 9.5 + 14.5 Combine like terms: 9.5 + 14.5 = 24 x = 24 Simplifying x = 24

Subproblem 2

x + -14.5 = -9.5 Simplifying x + -14.5 = -9.5 Reorder the terms: -14.5 + x = -9.5 Solving -14.5 + x = -9.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14.5' to each side of the equation. -14.5 + 14.5 + x = -9.5 + 14.5 Combine like terms: -14.5 + 14.5 = 0.0 0.0 + x = -9.5 + 14.5 x = -9.5 + 14.5 Combine like terms: -9.5 + 14.5 = 5 x = 5 Simplifying x = 5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24, 5}

See similar equations:

| 2y-17=7+6y | | -13-77x=7x+15 | | -4+11x=2+10x | | -8t^2+6t+6=0 | | 9.2=-.01x^2+.29x+7.3 | | 8n-11=3 | | 10t+4-12t= | | -4-2=-3x+3 | | 7x+1=-69 | | 6x-1=-2 | | 7+2i/2-3i | | 49x^2+56x+12= | | 2(2x+1)-3(x+1)=8 | | (1/7x)-(2/3x)=1 | | -6n^2+3=0 | | 12x^2+60x^4+24x^6=0 | | 0=-.01x^2+.29x+7.3 | | 4x+3y-8-6x+2y-5= | | 1x=21x | | 1/2x+9=20 | | -3-5x=5-7 | | -3f^2+4f+7=0 | | [3x-4]=14 | | 2p^2+4p+2=0 | | 0=-16x^2+1440x-22400 | | 0.50x=10 | | -j^2+6j-9=0 | | 5x+100=500 | | 8+64x-16x^2=0 | | 8+64x-16x^2=t | | (5/-31)+(-9/8) | | 4(x-2)+9=2x-3 |

Equations solver categories