18x^2-15x-3=-11

Simple and best practice solution for 18x^2-15x-3=-11 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 18x^2-15x-3=-11 equation:


Simplifying
18x2 + -15x + -3 = -11

Reorder the terms:
-3 + -15x + 18x2 = -11

Solving
-3 + -15x + 18x2 = -11

Solving for variable 'x'.

Reorder the terms:
-3 + 11 + -15x + 18x2 = -11 + 11

Combine like terms: -3 + 11 = 8
8 + -15x + 18x2 = -11 + 11

Combine like terms: -11 + 11 = 0
8 + -15x + 18x2 = 0

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

Divide each side by '18'.
0.4444444444 + -0.8333333333x + x2 = 0

Move the constant term to the right:

Add '-0.4444444444' to each side of the equation.
0.4444444444 + -0.8333333333x + -0.4444444444 + x2 = 0 + -0.4444444444

Reorder the terms:
0.4444444444 + -0.4444444444 + -0.8333333333x + x2 = 0 + -0.4444444444

Combine like terms: 0.4444444444 + -0.4444444444 = 0.0000000000
0.0000000000 + -0.8333333333x + x2 = 0 + -0.4444444444
-0.8333333333x + x2 = 0 + -0.4444444444

Combine like terms: 0 + -0.4444444444 = -0.4444444444
-0.8333333333x + x2 = -0.4444444444

The x term is -0.8333333333x.  Take half its coefficient (-0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
-0.8333333333x + 0.1736111111 + x2 = -0.4444444444 + 0.1736111111

Reorder the terms:
0.1736111111 + -0.8333333333x + x2 = -0.4444444444 + 0.1736111111

Combine like terms: -0.4444444444 + 0.1736111111 = -0.2708333333
0.1736111111 + -0.8333333333x + x2 = -0.2708333333

Factor a perfect square on the left side:
(x + -0.4166666667)(x + -0.4166666667) = -0.2708333333

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 10w=4800 | | 6a+7=10 | | (5y+6)-(5+4y)=12 | | 4r^2-4r-9=0 | | p^2+11p+34=4 | | x-4(3+6x)= | | 3/10x-7/12 | | cos(3)x=cos(0.5)x | | a^2+3a-13=5 | | 15x^2+65x+20=0 | | 6x+1=70 | | m=3p-4 | | 9x+9y=27 | | -4=8+x | | n^2-10n+13=-3 | | 9n-4=5n-20 | | 5a^2b*2ab^2= | | x-2(4+3x)= | | x^2-16x=-48 | | h=7cos(0.5t)+10 | | 0.18(x-8700)0.15(x+8700)=50000 | | (4a^2-3ab-2b^2)(2a-5b)= | | 5x-7+2x=4x+8 | | 3x+x+2=46 | | 2/7x-12=36 | | x+x+0.33=50000 | | x+x+0.33=8700 | | 7b-2=3b-6 | | 12x-9=40x-12 | | 0.15(x+8700)+0.18(x+8700)=50000 | | x-4(3+2x)= | | -7(y+6)=-8y |

Equations solver categories