2x^2-7x+4=0

Simple and best practice solution for 2x^2-7x+4=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^2-7x+4=0 equation:


Simplifying
2x2 + -7x + 4 = 0

Reorder the terms:
4 + -7x + 2x2 = 0

Solving
4 + -7x + 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'.
2 + -3.5x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -3.5x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -3.5x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -3.5x + x2 = 0 + -2
-3.5x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-3.5x + x2 = -2

The x term is -3.5x.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5x + 3.0625 + x2 = -2 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = -2 + 3.0625

Combine like terms: -2 + 3.0625 = 1.0625
3.0625 + -3.5x + x2 = 1.0625

Factor a perfect square on the left side:
(x + -1.75)(x + -1.75) = 1.0625

Calculate the square root of the right side: 1.030776406

Break this problem into two subproblems by setting 
(x + -1.75) equal to 1.030776406 and -1.030776406.

Subproblem 1

x + -1.75 = 1.030776406 Simplifying x + -1.75 = 1.030776406 Reorder the terms: -1.75 + x = 1.030776406 Solving -1.75 + x = 1.030776406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + x = 1.030776406 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = 1.030776406 + 1.75 x = 1.030776406 + 1.75 Combine like terms: 1.030776406 + 1.75 = 2.780776406 x = 2.780776406 Simplifying x = 2.780776406

Subproblem 2

x + -1.75 = -1.030776406 Simplifying x + -1.75 = -1.030776406 Reorder the terms: -1.75 + x = -1.030776406 Solving -1.75 + x = -1.030776406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + x = -1.030776406 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = -1.030776406 + 1.75 x = -1.030776406 + 1.75 Combine like terms: -1.030776406 + 1.75 = 0.719223594 x = 0.719223594 Simplifying x = 0.719223594

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.780776406, 0.719223594}

See similar equations:

| 7.4=x+3.7 | | -(7y+2)-(6y-6)=2 | | 2x^2+10x+11=0 | | 16(3x-6)=4(12x+1) | | 3(t-2)+5t=4(2t+5)-10 | | 3x^2+36=0 | | 9+16r-2=9r+119-7r | | 3(3+4x)-7=110 | | 7y-5=6y-1 | | 3(3+4x)-8=97 | | -7(4b+1)+(29b-7)=0 | | x^2-8x-17=0 | | 5.2q-2.2-4.8q=-0.6-1.3 | | x^2-4x-11=0 | | -(7y+1)-(-6y-4)=-5 | | 16x^2-24x-27=0 | | x^2-x=30 | | m-47=-35 | | x^2-30=0 | | -9x=4x^2-1 | | 8x^2+2x-21=0 | | 3x+x-5x=5 | | 5y-8+y+58=5y+50-1y | | 1.2-8=x | | -(5y+1)-(-4y-4)=-1 | | 3x+x-5x=1 | | 80y+408=12y | | x=4+2y | | 80y+408=120y | | 79-(5x+14)=5(x+2)+x | | X+26=13 | | 13+11a=7 |

Equations solver categories