4x^2+20x+25=-18

Simple and best practice solution for 4x^2+20x+25=-18 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 4x^2+20x+25=-18 equation:


Simplifying
4x2 + 20x + 25 = -18

Reorder the terms:
25 + 20x + 4x2 = -18

Solving
25 + 20x + 4x2 = -18

Solving for variable 'x'.

Reorder the terms:
25 + 18 + 20x + 4x2 = -18 + 18

Combine like terms: 25 + 18 = 43
43 + 20x + 4x2 = -18 + 18

Combine like terms: -18 + 18 = 0
43 + 20x + 4x2 = 0

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

Divide each side by '4'.
10.75 + 5x + x2 = 0

Move the constant term to the right:

Add '-10.75' to each side of the equation.
10.75 + 5x + -10.75 + x2 = 0 + -10.75

Reorder the terms:
10.75 + -10.75 + 5x + x2 = 0 + -10.75

Combine like terms: 10.75 + -10.75 = 0.00
0.00 + 5x + x2 = 0 + -10.75
5x + x2 = 0 + -10.75

Combine like terms: 0 + -10.75 = -10.75
5x + x2 = -10.75

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -10.75 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -10.75 + 6.25

Combine like terms: -10.75 + 6.25 = -4.5
6.25 + 5x + x2 = -4.5

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = -4.5

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 16x=10x | | x^2-14x+49=-36 | | 7x+50=4x+32 | | 2*(234*x)-12=476 | | 8-(-y-4)=3(y+3)-7(y+3) | | 9x^2-24x+16=81 | | 5+2x=5(x+1)-4(x-4) | | x^2+8x+16=27 | | -(x+8)+9=4x+1-5x | | -2x+y=-6 | | 2x^2+12x+19=0 | | 10x-45= | | -(1-m)=-(6m+1) | | 3x^2-20x+17=0 | | 6x=80-4x | | 6(7c-1)-10=40c+6 | | 8(y-2)=3y-31 | | 9u-2u+6v= | | 5-2x=19+5x | | 5x-15=3x+5 | | -7n+16=-3n-4 | | -3y-11=5y+21 | | 5y-1=3y+5 | | 5.3x+4=4*3x | | 7(5x-2)=36x | | -8c+1=-39 | | 6-b=21 | | 5(2c-1)-5=7c+2 | | (25b-3)-6(4b+1)=0 | | 17k-16k+3k+2k-5k=9 | | 3t-1=4(t+7) | | -2(t+6)=4 |

Equations solver categories