2q^2+8q=3

Simple and best practice solution for 2q^2+8q=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 2q^2+8q=3 equation:


Simplifying
2q2 + 8q = 3

Reorder the terms:
8q + 2q2 = 3

Solving
8q + 2q2 = 3

Solving for variable 'q'.

Reorder the terms:
-3 + 8q + 2q2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 8q + 2q2 = 0

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

Divide each side by '2'.
-1.5 + 4q + q2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 4q + 1.5 + q2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 4q + q2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 4q + q2 = 0 + 1.5
4q + q2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
4q + q2 = 1.5

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 = 1.5 + 4

Reorder the terms:
4 + 4q + q2 = 1.5 + 4

Combine like terms: 1.5 + 4 = 5.5
4 + 4q + q2 = 5.5

Factor a perfect square on the left side:
(q + 2)(q + 2) = 5.5

Calculate the square root of the right side: 2.34520788

Break this problem into two subproblems by setting 
(q + 2) equal to 2.34520788 and -2.34520788.

Subproblem 1

q + 2 = 2.34520788 Simplifying q + 2 = 2.34520788 Reorder the terms: 2 + q = 2.34520788 Solving 2 + q = 2.34520788 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 = 2.34520788 + -2 Combine like terms: 2 + -2 = 0 0 + q = 2.34520788 + -2 q = 2.34520788 + -2 Combine like terms: 2.34520788 + -2 = 0.34520788 q = 0.34520788 Simplifying q = 0.34520788

Subproblem 2

q + 2 = -2.34520788 Simplifying q + 2 = -2.34520788 Reorder the terms: 2 + q = -2.34520788 Solving 2 + q = -2.34520788 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 = -2.34520788 + -2 Combine like terms: 2 + -2 = 0 0 + q = -2.34520788 + -2 q = -2.34520788 + -2 Combine like terms: -2.34520788 + -2 = -4.34520788 q = -4.34520788 Simplifying q = -4.34520788

Solution

The solution to the problem is based on the solutions from the subproblems. q = {0.34520788, -4.34520788}

See similar equations:

| 2x-0.66666666666666666666666666666667(4x-12)=x+7 | | 8x^2+19x=35 | | 3x-4+24=5x-2+9x | | 8x^2+19x-35=0 | | 360-(38x+2)=.5(16x+4) | | 96=x(20-2x)(10-2x) | | -4=n+4-4 | | 5x+6y=-28 | | 3x-5y+2-9=0 | | 4-4x+8=-8 | | 37x+5-23x-5=5x+17 | | 2.73-4.5(2.1x-5.1432)=6.32x+5 | | (37x+5)-(23x-5)=5x+17 | | 13x^4+12x^3-9x^2-84x+7=0 | | 12x+16-10x=5x | | 1+4b-6b=-5 | | x(9-x)+6x=-4 | | 8(9s^2-108s-14)=0 | | (37x+5)-(23x-5)=95x+17 | | 138=3(4-7v) | | 2/9x23/7 | | 3.3*10^-4/5.5*10^-11 | | 190-(13x-7)=5x-5 | | T^2-15T+3T-45=0 | | 16n^2-25=9 | | (5/9)6 | | 1/3r3-1/2 | | 5-2(x+5)=35 | | d-1/3=5/12 | | 190-13x-7=5x-5 | | f(x)=2x^2-32x+120 | | 4x+2(x-3)=8 |

Equations solver categories