8x^2+13=20x

Simple and best practice solution for 8x^2+13=20x 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 8x^2+13=20x equation:


Simplifying
8x2 + 13 = 20x

Reorder the terms:
13 + 8x2 = 20x

Solving
13 + 8x2 = 20x

Solving for variable 'x'.

Reorder the terms:
13 + -20x + 8x2 = 20x + -20x

Combine like terms: 20x + -20x = 0
13 + -20x + 8x2 = 0

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

Divide each side by '8'.
1.625 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-1.625' to each side of the equation.
1.625 + -2.5x + -1.625 + x2 = 0 + -1.625

Reorder the terms:
1.625 + -1.625 + -2.5x + x2 = 0 + -1.625

Combine like terms: 1.625 + -1.625 = 0.000
0.000 + -2.5x + x2 = 0 + -1.625
-2.5x + x2 = 0 + -1.625

Combine like terms: 0 + -1.625 = -1.625
-2.5x + x2 = -1.625

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -1.625 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -1.625 + 1.5625

Combine like terms: -1.625 + 1.5625 = -0.0625
1.5625 + -2.5x + x2 = -0.0625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = -0.0625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 19x^2-9=0 | | (9b-7)-4(2b+1)=-3 | | (3x-4)+10=5(x+4) | | 63x^3-28x^2+45x-20=0 | | 3+23a= | | 27x^3-18x^2+9x=0 | | 9w^2+21w-8=0 | | -9(x-27)+3(x+3)=x-17 | | -21x^7-7x^6=0 | | -16x=-4x^3 | | -4(5n+6)=8 | | -(7y+2)-(-6y-6)=-1 | | 8(3x-1)=4(6x+3) | | 8+8y-3=8y+20-5y | | (4a*2)+2+(5a*3)+1= | | log*5*(x-3)=3 | | 16r+9r=225 | | 5a-7b+2b=0 | | (4a)(2+2)+(5a)(3+1)= | | (-3p)4= | | -7.2x=57.6 | | ln*(12x-6)=ln*12 | | x^2-28x+80=0 | | -4(3b+3)+(13b-6)=0 | | 7X+5x=5x+17 | | 3.7q-5.1-4.5q=-1.8q-1.5 | | 3n-9=7n+5 | | x^2=-15x-54 | | X^2-9=49 | | 3x^2+24x=-49 | | 5x^2+6x=33x-10 | | (x-1)(3x-4)=2 |

Equations solver categories