2x^2+17=20x

Simple and best practice solution for 2x^2+17=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 2x^2+17=20x equation:


Simplifying
2x2 + 17 = 20x

Reorder the terms:
17 + 2x2 = 20x

Solving
17 + 2x2 = 20x

Solving for variable 'x'.

Reorder the terms:
17 + -20x + 2x2 = 20x + -20x

Combine like terms: 20x + -20x = 0
17 + -20x + 2x2 = 0

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

Divide each side by '2'.
8.5 + -10x + x2 = 0

Move the constant term to the right:

Add '-8.5' to each side of the equation.
8.5 + -10x + -8.5 + x2 = 0 + -8.5

Reorder the terms:
8.5 + -8.5 + -10x + x2 = 0 + -8.5

Combine like terms: 8.5 + -8.5 = 0.0
0.0 + -10x + x2 = 0 + -8.5
-10x + x2 = 0 + -8.5

Combine like terms: 0 + -8.5 = -8.5
-10x + x2 = -8.5

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -8.5 + 25

Reorder the terms:
25 + -10x + x2 = -8.5 + 25

Combine like terms: -8.5 + 25 = 16.5
25 + -10x + x2 = 16.5

Factor a perfect square on the left side:
(x + -5)(x + -5) = 16.5

Calculate the square root of the right side: 4.062019202

Break this problem into two subproblems by setting 
(x + -5) equal to 4.062019202 and -4.062019202.

Subproblem 1

x + -5 = 4.062019202 Simplifying x + -5 = 4.062019202 Reorder the terms: -5 + x = 4.062019202 Solving -5 + x = 4.062019202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 4.062019202 + 5 Combine like terms: -5 + 5 = 0 0 + x = 4.062019202 + 5 x = 4.062019202 + 5 Combine like terms: 4.062019202 + 5 = 9.062019202 x = 9.062019202 Simplifying x = 9.062019202

Subproblem 2

x + -5 = -4.062019202 Simplifying x + -5 = -4.062019202 Reorder the terms: -5 + x = -4.062019202 Solving -5 + x = -4.062019202 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -4.062019202 + 5 Combine like terms: -5 + 5 = 0 0 + x = -4.062019202 + 5 x = -4.062019202 + 5 Combine like terms: -4.062019202 + 5 = 0.937980798 x = 0.937980798 Simplifying x = 0.937980798

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.062019202, 0.937980798}

See similar equations:

| 4r^2-12r-16=0 | | 4=n+12 | | 4x^2-68x+120=0 | | 25y=-175 | | -11.1x=22.2 | | 4x-7=3x-4 | | x^4+y^4=0 | | C=3x+60 | | 45.58+y=114.05 | | (4x+5)-(-2x+7)= | | 3x+12=3x-24 | | Pp+Qq=Rr | | B*8+3=6 | | -58a=-1102 | | 5+a-7=10 | | 3x-3=-15 | | 129+x=-27 | | 4(-4)+2X=8 | | x^2+12=61 | | 4R-[2r-(3R-4r)]= | | 2(9x)=162 | | -24=-97+b | | 68.95d+12=357.75 | | 2h-5=11 | | 8x^2-19x=0 | | -4(49)= | | x^2-14x-147=0 | | 4r^2-7r-16=0 | | 2x-(x-5)=6+(x+1) | | t+(-67)=-101 | | -6(2x+3)= | | 24r^2+44r-140=0 |

Equations solver categories