7x^2=16x+38

Simple and best practice solution for 7x^2=16x+38 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=16x+38 equation:


Simplifying
7x2 = 16x + 38

Reorder the terms:
7x2 = 38 + 16x

Solving
7x2 = 38 + 16x

Solving for variable 'x'.

Reorder the terms:
-38 + -16x + 7x2 = 38 + 16x + -38 + -16x

Reorder the terms:
-38 + -16x + 7x2 = 38 + -38 + 16x + -16x

Combine like terms: 38 + -38 = 0
-38 + -16x + 7x2 = 0 + 16x + -16x
-38 + -16x + 7x2 = 16x + -16x

Combine like terms: 16x + -16x = 0
-38 + -16x + 7x2 = 0

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

Divide each side by '7'.
-5.428571429 + -2.285714286x + x2 = 0

Move the constant term to the right:

Add '5.428571429' to each side of the equation.
-5.428571429 + -2.285714286x + 5.428571429 + x2 = 0 + 5.428571429

Reorder the terms:
-5.428571429 + 5.428571429 + -2.285714286x + x2 = 0 + 5.428571429

Combine like terms: -5.428571429 + 5.428571429 = 0.000000000
0.000000000 + -2.285714286x + x2 = 0 + 5.428571429
-2.285714286x + x2 = 0 + 5.428571429

Combine like terms: 0 + 5.428571429 = 5.428571429
-2.285714286x + x2 = 5.428571429

The x term is -2.285714286x.  Take half its coefficient (-1.142857143).
Square it (1.306122449) and add it to both sides.

Add '1.306122449' to each side of the equation.
-2.285714286x + 1.306122449 + x2 = 5.428571429 + 1.306122449

Reorder the terms:
1.306122449 + -2.285714286x + x2 = 5.428571429 + 1.306122449

Combine like terms: 5.428571429 + 1.306122449 = 6.734693878
1.306122449 + -2.285714286x + x2 = 6.734693878

Factor a perfect square on the left side:
(x + -1.142857143)(x + -1.142857143) = 6.734693878

Calculate the square root of the right side: 2.595128875

Break this problem into two subproblems by setting 
(x + -1.142857143) equal to 2.595128875 and -2.595128875.

Subproblem 1

x + -1.142857143 = 2.595128875 Simplifying x + -1.142857143 = 2.595128875 Reorder the terms: -1.142857143 + x = 2.595128875 Solving -1.142857143 + x = 2.595128875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.142857143' to each side of the equation. -1.142857143 + 1.142857143 + x = 2.595128875 + 1.142857143 Combine like terms: -1.142857143 + 1.142857143 = 0.000000000 0.000000000 + x = 2.595128875 + 1.142857143 x = 2.595128875 + 1.142857143 Combine like terms: 2.595128875 + 1.142857143 = 3.737986018 x = 3.737986018 Simplifying x = 3.737986018

Subproblem 2

x + -1.142857143 = -2.595128875 Simplifying x + -1.142857143 = -2.595128875 Reorder the terms: -1.142857143 + x = -2.595128875 Solving -1.142857143 + x = -2.595128875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.142857143' to each side of the equation. -1.142857143 + 1.142857143 + x = -2.595128875 + 1.142857143 Combine like terms: -1.142857143 + 1.142857143 = 0.000000000 0.000000000 + x = -2.595128875 + 1.142857143 x = -2.595128875 + 1.142857143 Combine like terms: -2.595128875 + 1.142857143 = -1.452271732 x = -1.452271732 Simplifying x = -1.452271732

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.737986018, -1.452271732}

See similar equations:

| f(x)=(2x^2)/(1-7x) | | 53=33-4(x-2) | | 6/204= | | 370+68x=982 | | 4b-5+(-a+3)i=7-8i | | 2x+10-x=8+3x-6 | | 4p-5=82 | | 2x+x+3+2x=93 | | 5x+9=3x-6 | | 24=w*6 | | 370x+68=982 | | 0x+4y=12 | | 2p+5q=13 | | 1/2(4x-16)-(-6)=-12 | | 10x+-8=2 | | 5a+3b=4cforb | | 9/3*(11) | | z/-5=2 | | 9/3*11 | | 3x^4-10x^3-14x^2+20x+16=0 | | 7.24a-12.3=0.5+4.84a | | 6*5/2 | | x-0.10x=225 | | 59000= | | x-0.10=225 | | -20=3*w-5 | | -19+3x-11+2x= | | 2x[x+3]+[x+2][x-5]= | | 07-3=53 | | 13ab+15ab=28ab | | -9.5+0.62=-3.18 | | 4(2a+a)-17=19 |

Equations solver categories