q^2-4q=43

Simple and best practice solution for q^2-4q=43 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 q^2-4q=43 equation:


Simplifying
q2 + -4q = 43

Reorder the terms:
-4q + q2 = 43

Solving
-4q + q2 = 43

Solving for variable 'q'.

Reorder the terms:
-43 + -4q + q2 = 43 + -43

Combine like terms: 43 + -43 = 0
-43 + -4q + q2 = 0

Begin completing the square.

Move the constant term to the right:

Add '43' to each side of the equation.
-43 + -4q + 43 + q2 = 0 + 43

Reorder the terms:
-43 + 43 + -4q + q2 = 0 + 43

Combine like terms: -43 + 43 = 0
0 + -4q + q2 = 0 + 43
-4q + q2 = 0 + 43

Combine like terms: 0 + 43 = 43
-4q + q2 = 43

The q term is -4q.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4q + 4 + q2 = 43 + 4

Reorder the terms:
4 + -4q + q2 = 43 + 4

Combine like terms: 43 + 4 = 47
4 + -4q + q2 = 47

Factor a perfect square on the left side:
(q + -2)(q + -2) = 47

Calculate the square root of the right side: 6.8556546

Break this problem into two subproblems by setting 
(q + -2) equal to 6.8556546 and -6.8556546.

Subproblem 1

q + -2 = 6.8556546 Simplifying q + -2 = 6.8556546 Reorder the terms: -2 + q = 6.8556546 Solving -2 + q = 6.8556546 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + q = 6.8556546 + 2 Combine like terms: -2 + 2 = 0 0 + q = 6.8556546 + 2 q = 6.8556546 + 2 Combine like terms: 6.8556546 + 2 = 8.8556546 q = 8.8556546 Simplifying q = 8.8556546

Subproblem 2

q + -2 = -6.8556546 Simplifying q + -2 = -6.8556546 Reorder the terms: -2 + q = -6.8556546 Solving -2 + q = -6.8556546 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + q = -6.8556546 + 2 Combine like terms: -2 + 2 = 0 0 + q = -6.8556546 + 2 q = -6.8556546 + 2 Combine like terms: -6.8556546 + 2 = -4.8556546 q = -4.8556546 Simplifying q = -4.8556546

Solution

The solution to the problem is based on the solutions from the subproblems. q = {8.8556546, -4.8556546}

See similar equations:

| -99x-21=35-x | | 8b^2-8b=0 | | 0.5x+3=2x-2 | | 8(j-60)=600 | | -4k^2-88k=108 | | 6x/x-11+1=3/x-11 | | 3(3x-2)+9=4(5x-2) | | 3/x=tan27 | | 3[3-3(x-1)]+1=2(-14-x)+2x+14 | | a^2-a-3.75=0 | | 14/5-4/9 | | 4x-5(4-x)=52 | | 4(a-6)-a=42.3 | | 25y^4-10y^3= | | 4(m-3)=12-3m | | g^2+26g=47 | | -5x+3x-2=0 | | i=40000*.052*3 | | 3+14x-5x^2=0 | | 50+4j=30 | | -24=(-6/7x) | | 400-35(7)+20(2)=x | | 0=ln(x^2+4) | | 56-2w=28 | | x=y-4y | | 400-35(7)+20(-2)=x | | j^2-2j-39=0 | | 30=-6/5y | | 10x-3x^2-1.33=0 | | 16/361=r^2 | | (12x+2)x=10x(x+1) | | 16/361=x |

Equations solver categories