7x^2-14x=3

Simple and best practice solution for 7x^2-14x=3 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 7x^2-14x=3 equation:


Simplifying
7x2 + -14x = 3

Reorder the terms:
-14x + 7x2 = 3

Solving
-14x + 7x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + -14x + 7x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + -14x + 7x2 = 0

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

Divide each side by '7'.
-0.4285714286 + -2x + x2 = 0

Move the constant term to the right:

Add '0.4285714286' to each side of the equation.
-0.4285714286 + -2x + 0.4285714286 + x2 = 0 + 0.4285714286

Reorder the terms:
-0.4285714286 + 0.4285714286 + -2x + x2 = 0 + 0.4285714286

Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000
0.0000000000 + -2x + x2 = 0 + 0.4285714286
-2x + x2 = 0 + 0.4285714286

Combine like terms: 0 + 0.4285714286 = 0.4285714286
-2x + x2 = 0.4285714286

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 0.4285714286 + 1

Reorder the terms:
1 + -2x + x2 = 0.4285714286 + 1

Combine like terms: 0.4285714286 + 1 = 1.4285714286
1 + -2x + x2 = 1.4285714286

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1.4285714286

Calculate the square root of the right side: 1.195228609

Break this problem into two subproblems by setting 
(x + -1) equal to 1.195228609 and -1.195228609.

Subproblem 1

x + -1 = 1.195228609 Simplifying x + -1 = 1.195228609 Reorder the terms: -1 + x = 1.195228609 Solving -1 + x = 1.195228609 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.195228609 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.195228609 + 1 x = 1.195228609 + 1 Combine like terms: 1.195228609 + 1 = 2.195228609 x = 2.195228609 Simplifying x = 2.195228609

Subproblem 2

x + -1 = -1.195228609 Simplifying x + -1 = -1.195228609 Reorder the terms: -1 + x = -1.195228609 Solving -1 + x = -1.195228609 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.195228609 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.195228609 + 1 x = -1.195228609 + 1 Combine like terms: -1.195228609 + 1 = -0.195228609 x = -0.195228609 Simplifying x = -0.195228609

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.195228609, -0.195228609}

See similar equations:

| 3.5x+4x=11.5 | | -4p+p=-5 | | t=(3a+4)(3a+4) | | -7(y-6)=-70 | | 4x-(5x-6)= | | 3a+5b-7a-2b= | | 5x+3-6x=0 | | 5x+3-6c=0 | | 32xy=236 | | 8x^4+6x^2-2= | | 5-(15x-1)=13x | | -11-3x=44 | | 9x/4=5/7 | | 30000/7500 | | 20x+10(2x)+10x+1(5x)=750 | | y=5+x^2+2x | | -5-2n=-2(1+n)-3 | | v+4.74=7.4 | | 18/3=v/7 | | 8(x-7)=-24-8x | | 64-x^6= | | 6(v-1)-6=-7(-4v+1)-7v | | 5y+2=3y+22 | | -3(-4-2n)=19+6n | | y+2=23(x-9) | | Y=10c | | t=(x-1)(1-x) | | 8/3y=5/6x-2 | | 20log(x)=-12 | | -62=1-9w | | -39-2x=7x-6(1+7x) | | X^2+6x=59 |

Equations solver categories