3-5x-4x^2=0

Simple and best practice solution for 3-5x-4x^2=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 3-5x-4x^2=0 equation:


Simplifying
3 + -5x + -4x2 = 0

Solving
3 + -5x + -4x2 = 0

Solving for variable 'x'.

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

Divide each side by '-4'.
-0.75 + 1.25x + x2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 1.25x + 0.75 + x2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 1.25x + x2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 1.25x + x2 = 0 + 0.75
1.25x + x2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
1.25x + x2 = 0.75

The x term is 1.25x.  Take half its coefficient (0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
1.25x + 0.390625 + x2 = 0.75 + 0.390625

Reorder the terms:
0.390625 + 1.25x + x2 = 0.75 + 0.390625

Combine like terms: 0.75 + 0.390625 = 1.140625
0.390625 + 1.25x + x2 = 1.140625

Factor a perfect square on the left side:
(x + 0.625)(x + 0.625) = 1.140625

Calculate the square root of the right side: 1.068000468

Break this problem into two subproblems by setting 
(x + 0.625) equal to 1.068000468 and -1.068000468.

Subproblem 1

x + 0.625 = 1.068000468 Simplifying x + 0.625 = 1.068000468 Reorder the terms: 0.625 + x = 1.068000468 Solving 0.625 + x = 1.068000468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = 1.068000468 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = 1.068000468 + -0.625 x = 1.068000468 + -0.625 Combine like terms: 1.068000468 + -0.625 = 0.443000468 x = 0.443000468 Simplifying x = 0.443000468

Subproblem 2

x + 0.625 = -1.068000468 Simplifying x + 0.625 = -1.068000468 Reorder the terms: 0.625 + x = -1.068000468 Solving 0.625 + x = -1.068000468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = -1.068000468 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = -1.068000468 + -0.625 x = -1.068000468 + -0.625 Combine like terms: -1.068000468 + -0.625 = -1.693000468 x = -1.693000468 Simplifying x = -1.693000468

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.443000468, -1.693000468}

See similar equations:

| 9x+5=-3+2x+22 | | 1+6(7+8n)=135 | | -0.10(21)+0.85x=0.05(x-10) | | 8p-4=-7p-19 | | 6y=12+5 | | (8x^18)^-1/3 | | 0.18y+0.05(y+3000)=1530 | | -84=69999999999x-8 | | 0=.5*8+4 | | 2(2x+1)=4x-1 | | 3x=x+13+x+19 | | 2x+9+x+4=61 | | 3x=x+13+x+14 | | 102=6(-2n+7) | | x-50=9(2x+3)-9 | | 8p-4=7p+19 | | 2x+9=61 | | 28=4/7y | | -5.8(4x+6)-1.8(3x-5)= | | -1.10(22)+0.25x=0.05(x-4) | | -5x+12=-2(4x+3) | | 0.11y+0.09(y+4000)=960 | | 3-[6(7-4*5)]= | | 8x+(x+5)=40 | | 5x-7=-6x-36 | | x^2+y^2-2x+10y+25=0 | | 5x*2+4=61 | | 8(15.5)-28=6(15.5)+3 | | -5(x+3)+21=10-6x | | 2n/9=n-7 | | 5x=12x+2 | | v=6g/(g-3p) |

Equations solver categories