18X^2+4X-8=0

Simple and best practice solution for 18X^2+4X-8=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 18X^2+4X-8=0 equation:


Simplifying
18X2 + 4X + -8 = 0

Reorder the terms:
-8 + 4X + 18X2 = 0

Solving
-8 + 4X + 18X2 = 0

Solving for variable 'X'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-4 + 2X + 9X2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-4 + 2X + 9X2)' equal to zero and attempt to solve: Simplifying -4 + 2X + 9X2 = 0 Solving -4 + 2X + 9X2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. -0.4444444444 + 0.2222222222X + X2 = 0 Move the constant term to the right: Add '0.4444444444' to each side of the equation. -0.4444444444 + 0.2222222222X + 0.4444444444 + X2 = 0 + 0.4444444444 Reorder the terms: -0.4444444444 + 0.4444444444 + 0.2222222222X + X2 = 0 + 0.4444444444 Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000 0.0000000000 + 0.2222222222X + X2 = 0 + 0.4444444444 0.2222222222X + X2 = 0 + 0.4444444444 Combine like terms: 0 + 0.4444444444 = 0.4444444444 0.2222222222X + X2 = 0.4444444444 The X term is 0.2222222222X. Take half its coefficient (0.1111111111). Square it (0.01234567901) and add it to both sides. Add '0.01234567901' to each side of the equation. 0.2222222222X + 0.01234567901 + X2 = 0.4444444444 + 0.01234567901 Reorder the terms: 0.01234567901 + 0.2222222222X + X2 = 0.4444444444 + 0.01234567901 Combine like terms: 0.4444444444 + 0.01234567901 = 0.45679012341 0.01234567901 + 0.2222222222X + X2 = 0.45679012341 Factor a perfect square on the left side: (X + 0.1111111111)(X + 0.1111111111) = 0.45679012341 Calculate the square root of the right side: 0.675862503 Break this problem into two subproblems by setting (X + 0.1111111111) equal to 0.675862503 and -0.675862503.

Subproblem 1

X + 0.1111111111 = 0.675862503 Simplifying X + 0.1111111111 = 0.675862503 Reorder the terms: 0.1111111111 + X = 0.675862503 Solving 0.1111111111 + X = 0.675862503 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.1111111111' to each side of the equation. 0.1111111111 + -0.1111111111 + X = 0.675862503 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + X = 0.675862503 + -0.1111111111 X = 0.675862503 + -0.1111111111 Combine like terms: 0.675862503 + -0.1111111111 = 0.5647513919 X = 0.5647513919 Simplifying X = 0.5647513919

Subproblem 2

X + 0.1111111111 = -0.675862503 Simplifying X + 0.1111111111 = -0.675862503 Reorder the terms: 0.1111111111 + X = -0.675862503 Solving 0.1111111111 + X = -0.675862503 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.1111111111' to each side of the equation. 0.1111111111 + -0.1111111111 + X = -0.675862503 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + X = -0.675862503 + -0.1111111111 X = -0.675862503 + -0.1111111111 Combine like terms: -0.675862503 + -0.1111111111 = -0.7869736141 X = -0.7869736141 Simplifying X = -0.7869736141

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.5647513919, -0.7869736141}

Solution

X = {0.5647513919, -0.7869736141}

See similar equations:

| 40/12.20 | | -2(-3x+2)-3x-4=-4x+20 | | x^4-12x^2+27x=0 | | 5227.50=(1*5100+0.25r*5100) | | 9(3h-9)=32h+19 | | 5x+1=-2x+15 | | x+31=97 | | y-32=171 | | 5x+1=-2x | | -1.3j+.4=-1.16 | | 7a-3n=3+6a | | 4(c-2)=-2c+12+5c | | 7a-3n=3 | | -3b-11=4b+17 | | X-8=18-x | | -6x-2(-x-14)=8 | | t(t+4)=60 | | x+51=74 | | 5(32/17)=5-25(-3/17) | | 4s^2+20=-25 | | 8-3timesc=31 | | 3x^2+32x+192=0 | | 6x-20y=-16 | | 6x-5y= | | 7x+15+2x=4(x+2)+5x | | 3x-10y=-8 | | (-10/3)=2x-4x^1/2 | | 3.2r+14.7=6.74 | | 4(6y+3)=28 | | -3(2.5x-1)+20.2=35.475-5x | | -4x+4(-2x-4)=x+49 | | X/2-x/4+3=x+3 |

Equations solver categories