2x^2-17x+42=0

Simple and best practice solution for 2x^2-17x+42=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 2x^2-17x+42=0 equation:


Simplifying
2x2 + -17x + 42 = 0

Reorder the terms:
42 + -17x + 2x2 = 0

Solving
42 + -17x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
21 + -8.5x + x2 = 0

Move the constant term to the right:

Add '-21' to each side of the equation.
21 + -8.5x + -21 + x2 = 0 + -21

Reorder the terms:
21 + -21 + -8.5x + x2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -8.5x + x2 = 0 + -21
-8.5x + x2 = 0 + -21

Combine like terms: 0 + -21 = -21
-8.5x + x2 = -21

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = -21 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = -21 + 18.0625

Combine like terms: -21 + 18.0625 = -2.9375
18.0625 + -8.5x + x2 = -2.9375

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = -2.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 108=a+(2a) | | 4.22-3.13(x-1)=5.2(2x+1)-11.38 | | (x-14)(x-14)=25 | | -146+x=-9+64 | | Y^2+2z=-6y | | (3x-8)=0 | | 12-2x=y | | 2x^2=-12 | | .8*x=5.56 | | 3(11+6y)+-8y=-3 | | -98-10x=49-3x | | x-3(-2x+2)=-13 | | -(2-x)=2-x | | 4-x=4x+34 | | 6b^2+60b=-126 | | 40x+3=55x | | 4-x=4x+36 | | -2(1+4b)=-10 | | -57-9x=-2x+41 | | 4h+1.20=7.20 | | 6x+9=9x+21 | | 8.95+21.35= | | 4x+2=2x-10 | | -166+11x=42+3x | | 3x+8=14whatisx | | 3n-6+8n=-17 | | x+27+y*3=180 | | x-6x+6=-13 | | -83+7x=167-3x | | 7-x-2=-1 | | -11=3w-2 | | 4(x+1)=3(x-5) |

Equations solver categories