=x^2+0.4x+4

Simple and best practice solution for =x^2+0.4x+4 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 =x^2+0.4x+4 equation: 


Simplifying
0 = x2 + 0.4x + 4

Reorder the terms:
0 = 4 + 0.4x + x2

Solving
0 = 4 + 0.4x + x2

Solving for variable 'x'.

Combine like terms: 0 + -4 = -4
-4 + -0.4x + -1x2 = 4 + 0.4x + x2 + -4 + -0.4x + -1x2

Reorder the terms:
-4 + -0.4x + -1x2 = 4 + -4 + 0.4x + -0.4x + x2 + -1x2

Combine like terms: 4 + -4 = 0
-4 + -0.4x + -1x2 = 0 + 0.4x + -0.4x + x2 + -1x2
-4 + -0.4x + -1x2 = 0.4x + -0.4x + x2 + -1x2

Combine like terms: 0.4x + -0.4x = 0.0
-4 + -0.4x + -1x2 = 0.0 + x2 + -1x2
-4 + -0.4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4 + -0.4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
4 + 0.4x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 0.4x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + 0.4x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 0.4x + x2 = 0 + -4
0.4x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
0.4x + x2 = -4

The x term is 0.4x.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4x + 0.04 + x2 = -4 + 0.04

Reorder the terms:
0.04 + 0.4x + x2 = -4 + 0.04

Combine like terms: -4 + 0.04 = -3.96
0.04 + 0.4x + x2 = -3.96

Factor a perfect square on the left side:
(x + 0.2)(x + 0.2) = -3.96

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 3(90-x)-(180-x)=10 | | (x/7)=(x/8)-5 | | x^2+73x=0 | | x/7=x/8-5 | | 7e^9x=115 | | -57+x+6x=34 | | (9y+5)(9y+29)=0 | | -57+c= | | .04+.06= | | 15-x=3+8x-11 | | F(x)=0.5x^2-x-3 | | 4b-100=700 | | -111+12x-5x=29 | | 7(z+3)-4z=12 | | 8+(-14)= | | 17(8c-1)-14=134c+17 | | 14x-23=2 | | x^2+0.4x+4=0 | | 19(f+3.70+7.10)=221.35 | | 17=t-14 | | 6-5(1-x)=5 | | 42x^5/6x^2 | | sin(0.5x)=0.8 | | (4x^4)^3/16x^5 | | 0.5x^2+3x-1=19 | | (5(-27.5)-3)-(7(-27.5)+2)= | | 0.5x^2+3x-1=y | | x+25+5=4x | | A^2+b^2=72 | | -7.2(x-4.75)=28.8 | | -74+12x-3x=169 | | (5x-3)-(7x+2)=50 |

Equations solver categories