16x^2+46x+81=0

Simple and best practice solution for 16x^2+46x+81=0 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 16x^2+46x+81=0 equation:


Simplifying
16x2 + 46x + 81 = 0

Reorder the terms:
81 + 46x + 16x2 = 0

Solving
81 + 46x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
5.0625 + 2.875x + x2 = 0

Move the constant term to the right:

Add '-5.0625' to each side of the equation.
5.0625 + 2.875x + -5.0625 + x2 = 0 + -5.0625

Reorder the terms:
5.0625 + -5.0625 + 2.875x + x2 = 0 + -5.0625

Combine like terms: 5.0625 + -5.0625 = 0.0000
0.0000 + 2.875x + x2 = 0 + -5.0625
2.875x + x2 = 0 + -5.0625

Combine like terms: 0 + -5.0625 = -5.0625
2.875x + x2 = -5.0625

The x term is 2.875x.  Take half its coefficient (1.4375).
Square it (2.06640625) and add it to both sides.

Add '2.06640625' to each side of the equation.
2.875x + 2.06640625 + x2 = -5.0625 + 2.06640625

Reorder the terms:
2.06640625 + 2.875x + x2 = -5.0625 + 2.06640625

Combine like terms: -5.0625 + 2.06640625 = -2.99609375
2.06640625 + 2.875x + x2 = -2.99609375

Factor a perfect square on the left side:
(x + 1.4375)(x + 1.4375) = -2.99609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 8x-4=3x-6 | | 3v^2-4v-15= | | 3a+6-10a= | | 160-4x=30 | | (4x)/(x+1) | | 6+9/8n=24 | | x+.087x=17000 | | -6.2(4s+6)-2.3(3s-5)= | | 50+20+0.06(50+20)=x | | 5x-9x=20 | | 10s^2+33s-7=0 | | 2x^2*y-(5x^22y^6)/(x^20*y^5) | | 100000=3000/(20+a) | | W/4-6=-8 | | 40x-x^2=21 | | 2x^2*y-(5x^22y^6/x^20*y^5) | | n+4.8=8.1 | | 2w^2-5w-122=0 | | -5.4(4p+6)-1.4(2p-4)= | | 7c+-4=5c | | 7c+1=1y | | 7-3x=x-8 | | -4(x+9)-42=6-52 | | x+20+0.06(x+20)=y | | 2w^2-5w-115=0 | | 0.39x=21 | | 5w^2-5w-115=0 | | 3(5x+2)=33 | | (x-9)^2/3=9 | | 11d=6d-15 | | 5(x+4)-1=9 | | 120-4x=5 |

Equations solver categories