36x^2+7x-9=0

Simple and best practice solution for 36x^2+7x-9=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 36x^2+7x-9=0 equation:


Simplifying
36x2 + 7x + -9 = 0

Reorder the terms:
-9 + 7x + 36x2 = 0

Solving
-9 + 7x + 36x2 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-0.25 + 0.1944444444x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + 0.1944444444x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + 0.1944444444x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + 0.1944444444x + x2 = 0 + 0.25
0.1944444444x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
0.1944444444x + x2 = 0.25

The x term is 0.1944444444x.  Take half its coefficient (0.0972222222).
Square it (0.009452160490) and add it to both sides.

Add '0.009452160490' to each side of the equation.
0.1944444444x + 0.009452160490 + x2 = 0.25 + 0.009452160490

Reorder the terms:
0.009452160490 + 0.1944444444x + x2 = 0.25 + 0.009452160490

Combine like terms: 0.25 + 0.009452160490 = 0.25945216049
0.009452160490 + 0.1944444444x + x2 = 0.25945216049

Factor a perfect square on the left side:
(x + 0.0972222222)(x + 0.0972222222) = 0.25945216049

Calculate the square root of the right side: 0.509364467

Break this problem into two subproblems by setting 
(x + 0.0972222222) equal to 0.509364467 and -0.509364467.

Subproblem 1

x + 0.0972222222 = 0.509364467 Simplifying x + 0.0972222222 = 0.509364467 Reorder the terms: 0.0972222222 + x = 0.509364467 Solving 0.0972222222 + x = 0.509364467 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0972222222' to each side of the equation. 0.0972222222 + -0.0972222222 + x = 0.509364467 + -0.0972222222 Combine like terms: 0.0972222222 + -0.0972222222 = 0.0000000000 0.0000000000 + x = 0.509364467 + -0.0972222222 x = 0.509364467 + -0.0972222222 Combine like terms: 0.509364467 + -0.0972222222 = 0.4121422448 x = 0.4121422448 Simplifying x = 0.4121422448

Subproblem 2

x + 0.0972222222 = -0.509364467 Simplifying x + 0.0972222222 = -0.509364467 Reorder the terms: 0.0972222222 + x = -0.509364467 Solving 0.0972222222 + x = -0.509364467 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0972222222' to each side of the equation. 0.0972222222 + -0.0972222222 + x = -0.509364467 + -0.0972222222 Combine like terms: 0.0972222222 + -0.0972222222 = 0.0000000000 0.0000000000 + x = -0.509364467 + -0.0972222222 x = -0.509364467 + -0.0972222222 Combine like terms: -0.509364467 + -0.0972222222 = -0.6065866892 x = -0.6065866892 Simplifying x = -0.6065866892

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4121422448, -0.6065866892}

See similar equations:

| 2x^4+x^3-6x^2=0 | | 30x^3+32x^4-30x^5=0 | | 2x+8=168 | | 7/5x-4/7x=58/35 | | F(x)=(3x+8)(2x-5) | | 2x+8=148 | | h=-16t^2+8t+224 | | 36x^2+2x-3=0 | | 8(x)+15=4(x)+115 | | -7/13=-8 | | 6log(x^2+1)-x=0 | | 35w^19+35w^12+15w^6= | | 28+x=10 | | 5-12x+4x^2=0 | | 3(2z-4)=3(z-4) | | 3(3+h+h)=2(h+5) | | c^2-4cg+4g^2= | | 3(2x+1)=4x-8x | | 7(2x-5)+30=4(x-4)+25 | | 7+35x=15x+15 | | 3xy+9x=12 | | 3yx+9y=12 | | 4t-(3t-1)= | | 22-5(6v-1)=15-1630am | | 6x-9=6(x-4) | | 3xy+9y=12 | | [(x-2)^2/3]-4=5 | | (z/3)-6=15 | | 9y^2-42y+49= | | 16t^2+790=0 | | (3ab)(-4a^2b^3)= | | -7(y+9)=-6y-4 |

Equations solver categories