2h^2+7h+3=20

Simple and best practice solution for 2h^2+7h+3=20 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 2h^2+7h+3=20 equation:


Simplifying
2h2 + 7h + 3 = 20

Reorder the terms:
3 + 7h + 2h2 = 20

Solving
3 + 7h + 2h2 = 20

Solving for variable 'h'.

Reorder the terms:
3 + -20 + 7h + 2h2 = 20 + -20

Combine like terms: 3 + -20 = -17
-17 + 7h + 2h2 = 20 + -20

Combine like terms: 20 + -20 = 0
-17 + 7h + 2h2 = 0

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

Divide each side by '2'.
-8.5 + 3.5h + h2 = 0

Move the constant term to the right:

Add '8.5' to each side of the equation.
-8.5 + 3.5h + 8.5 + h2 = 0 + 8.5

Reorder the terms:
-8.5 + 8.5 + 3.5h + h2 = 0 + 8.5

Combine like terms: -8.5 + 8.5 = 0.0
0.0 + 3.5h + h2 = 0 + 8.5
3.5h + h2 = 0 + 8.5

Combine like terms: 0 + 8.5 = 8.5
3.5h + h2 = 8.5

The h term is 3.5h.  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.
3.5h + 3.0625 + h2 = 8.5 + 3.0625

Reorder the terms:
3.0625 + 3.5h + h2 = 8.5 + 3.0625

Combine like terms: 8.5 + 3.0625 = 11.5625
3.0625 + 3.5h + h2 = 11.5625

Factor a perfect square on the left side:
(h + 1.75)(h + 1.75) = 11.5625

Calculate the square root of the right side: 3.400367627

Break this problem into two subproblems by setting 
(h + 1.75) equal to 3.400367627 and -3.400367627.

Subproblem 1

h + 1.75 = 3.400367627 Simplifying h + 1.75 = 3.400367627 Reorder the terms: 1.75 + h = 3.400367627 Solving 1.75 + h = 3.400367627 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + h = 3.400367627 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + h = 3.400367627 + -1.75 h = 3.400367627 + -1.75 Combine like terms: 3.400367627 + -1.75 = 1.650367627 h = 1.650367627 Simplifying h = 1.650367627

Subproblem 2

h + 1.75 = -3.400367627 Simplifying h + 1.75 = -3.400367627 Reorder the terms: 1.75 + h = -3.400367627 Solving 1.75 + h = -3.400367627 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + h = -3.400367627 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + h = -3.400367627 + -1.75 h = -3.400367627 + -1.75 Combine like terms: -3.400367627 + -1.75 = -5.150367627 h = -5.150367627 Simplifying h = -5.150367627

Solution

The solution to the problem is based on the solutions from the subproblems. h = {1.650367627, -5.150367627}

See similar equations:

| x=-49/93 | | m=2(n+2)-6 | | 2.9=6.9+y | | x^2+6x-21=x | | 10x^2-27x+18.22=0 | | (x)(x+6)=432 | | 7(n-3)=-35 | | 8p+2=5p-4 | | 31=7-4h | | Q(Q)=0 | | 5x=15+2y | | Q(q-5)=0 | | 3x+1=5x+49 | | 5x+49=3x+1 | | X^2-34x+281=0 | | 480-x/16 | | 2y^2-17y+45=(y-7)(y-7) | | -8n-4+2n= | | 2x^2-18x=-9x | | (x+4)(x-1)=-6 | | b=3a-aw | | 5x=2x+28 | | 2x+1(3x-1)=4x+8+2(x-5) | | Q^2-5q+5=0 | | x+5x-46=74 | | 8x+10=22 | | 0.75(5)= | | 40x=1/2(161x-1-80) | | X(X-1)=552 | | 12x+66=11x | | 2x^2-21x-178=0 | | 12x=11x-66 |

Equations solver categories