5x^2+4x+40=0

Simple and best practice solution for 5x^2+4x+40=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 5x^2+4x+40=0 equation:


Simplifying
5x2 + 4x + 40 = 0

Reorder the terms:
40 + 4x + 5x2 = 0

Solving
40 + 4x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
8 + 0.8x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + 0.8x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + 0.8x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 0.8x + x2 = 0 + -8
0.8x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
0.8x + x2 = -8

The x term is 0.8x.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8x + 0.16 + x2 = -8 + 0.16

Reorder the terms:
0.16 + 0.8x + x2 = -8 + 0.16

Combine like terms: -8 + 0.16 = -7.84
0.16 + 0.8x + x2 = -7.84

Factor a perfect square on the left side:
(x + 0.4)(x + 0.4) = -7.84

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 1.4=1 | | 2-4/58 | | 15-12=x/-6 | | 356=2m+17g | | 6X-(3x+5)=7x-37 | | -7-6=-9+x | | (-11/7)m=9 | | M=20-8 | | 2x-3x+7x=2x-2x | | -8(x+2)=-24 | | 2x=1(2x-8)-(10+2x) | | Y^2=-22/5y-121/25 | | 11y=2(5y-4) | | 113.70+4(7.54)h=144 | | 12p-24=15p-24 | | -6x+18y+5=0 | | 9u+28=16u | | (x^2)-(18x)+14=0 | | (w+4)=(w-1) | | 2x^2+4xh=144 | | -2a-I+5a=19 | | 24=3x+2y | | .15x=34 | | 2x-5+8x=5(4x-2)+3 | | 8x-12y-36=0 | | 2x-5+8x=5(4x-2) | | 61=3x+2y | | x/511 | | 9x-8+7x= | | -10=7x+9x | | 2y(6y-8)=2y(6y)+2y(-8) | | 2(z+2)+9z=26 |

Equations solver categories