100x^2-5x-4=0

Simple and best practice solution for 100x^2-5x-4=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 100x^2-5x-4=0 equation:


Simplifying
100x2 + -5x + -4 = 0

Reorder the terms:
-4 + -5x + 100x2 = 0

Solving
-4 + -5x + 100x2 = 0

Solving for variable 'x'.

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

Divide each side by '100'.
-0.04 + -0.05x + x2 = 0

Move the constant term to the right:

Add '0.04' to each side of the equation.
-0.04 + -0.05x + 0.04 + x2 = 0 + 0.04

Reorder the terms:
-0.04 + 0.04 + -0.05x + x2 = 0 + 0.04

Combine like terms: -0.04 + 0.04 = 0.00
0.00 + -0.05x + x2 = 0 + 0.04
-0.05x + x2 = 0 + 0.04

Combine like terms: 0 + 0.04 = 0.04
-0.05x + x2 = 0.04

The x term is -0.05x.  Take half its coefficient (-0.025).
Square it (0.000625) and add it to both sides.

Add '0.000625' to each side of the equation.
-0.05x + 0.000625 + x2 = 0.04 + 0.000625

Reorder the terms:
0.000625 + -0.05x + x2 = 0.04 + 0.000625

Combine like terms: 0.04 + 0.000625 = 0.040625
0.000625 + -0.05x + x2 = 0.040625

Factor a perfect square on the left side:
(x + -0.025)(x + -0.025) = 0.040625

Calculate the square root of the right side: 0.201556444

Break this problem into two subproblems by setting 
(x + -0.025) equal to 0.201556444 and -0.201556444.

Subproblem 1

x + -0.025 = 0.201556444 Simplifying x + -0.025 = 0.201556444 Reorder the terms: -0.025 + x = 0.201556444 Solving -0.025 + x = 0.201556444 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.025' to each side of the equation. -0.025 + 0.025 + x = 0.201556444 + 0.025 Combine like terms: -0.025 + 0.025 = 0.000 0.000 + x = 0.201556444 + 0.025 x = 0.201556444 + 0.025 Combine like terms: 0.201556444 + 0.025 = 0.226556444 x = 0.226556444 Simplifying x = 0.226556444

Subproblem 2

x + -0.025 = -0.201556444 Simplifying x + -0.025 = -0.201556444 Reorder the terms: -0.025 + x = -0.201556444 Solving -0.025 + x = -0.201556444 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.025' to each side of the equation. -0.025 + 0.025 + x = -0.201556444 + 0.025 Combine like terms: -0.025 + 0.025 = 0.000 0.000 + x = -0.201556444 + 0.025 x = -0.201556444 + 0.025 Combine like terms: -0.201556444 + 0.025 = -0.176556444 x = -0.176556444 Simplifying x = -0.176556444

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.226556444, -0.176556444}

See similar equations:

| Y-6/7y=16 | | -2.6=m/1.6 | | 3.4x-1.7=2.4x+2.3 | | -5(4t-3)+7t=8t-4 | | 7p-5=32 | | 560000=134-(82x+120000) | | 2.3-1.7= | | 33(7x*88)=x | | -13y+16(15y+15)=1375 | | .09=x*.3+(1-x)*.7 | | 16t=x-3 | | 8x+1=4-(3-8x) | | 2.4x+3.4x= | | 77=7(s+4) | | 9.95+x=10.65 | | 3v-9=v+7+2v | | 3x^2+2xy+2y^2+7=0 | | 10x=13x-12 | | 3x+7=-5x+20 | | 14/[5*(17-9)-33] | | y=164+32.3x | | 1/4x^2-1/2x-6=0 | | 0=5/6x-15 | | 2[3-(2x-1)]=3[7-2(x+2)] | | 5+4h=17 | | ln(9x)+ln(5x)=13 | | 8x+5=7x+2 | | 4-2x=-5x-29 | | x=3y(10) | | Sin^2(2x)=4cos^2x-4cos^4x | | -4x-20y=-2 | | v+17=21 |

Equations solver categories