4x^2+-6x-9=0

Simple and best practice solution for 4x^2+-6x-9=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 4x^2+-6x-9=0 equation:


Simplifying
4x2 + -6x + -9 = 0

Reorder the terms:
-9 + -6x + 4x2 = 0

Solving
-9 + -6x + 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'.
-2.25 + -1.5x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + -1.5x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + -1.5x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + -1.5x + x2 = 0 + 2.25
-1.5x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
-1.5x + x2 = 2.25

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 2.25 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 2.25 + 0.5625

Combine like terms: 2.25 + 0.5625 = 2.8125
0.5625 + -1.5x + x2 = 2.8125

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 2.8125

Calculate the square root of the right side: 1.677050983

Break this problem into two subproblems by setting 
(x + -0.75) equal to 1.677050983 and -1.677050983.

Subproblem 1

x + -0.75 = 1.677050983 Simplifying x + -0.75 = 1.677050983 Reorder the terms: -0.75 + x = 1.677050983 Solving -0.75 + x = 1.677050983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 1.677050983 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 1.677050983 + 0.75 x = 1.677050983 + 0.75 Combine like terms: 1.677050983 + 0.75 = 2.427050983 x = 2.427050983 Simplifying x = 2.427050983

Subproblem 2

x + -0.75 = -1.677050983 Simplifying x + -0.75 = -1.677050983 Reorder the terms: -0.75 + x = -1.677050983 Solving -0.75 + x = -1.677050983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -1.677050983 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -1.677050983 + 0.75 x = -1.677050983 + 0.75 Combine like terms: -1.677050983 + 0.75 = -0.927050983 x = -0.927050983 Simplifying x = -0.927050983

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.427050983, -0.927050983}

See similar equations:

| 5.4+1.2n=2.40 | | 3.4(2.5x+2.8)=9 | | x^2=-7-7 | | 124+37=180 | | 4.9+1.8n=1.2 | | g^2+17g+c=0 | | 18(x-1)=6(3x+2)-30 | | 2x+y=-72 | | 32y+5y= | | 3x-10+30=180 | | 2/t+4/3t=4/t+2 | | 16t^2+25t-7=0 | | 6b+7b-10= | | 120+(22*x)=98+(6*x) | | 1/8t*24 | | 9y-4x=68 | | .7x+.8=.9x-.6 | | (2x^2y)^3/4y | | 7x-5y=-133 | | 8(x-11)=-2(x-41) | | 1/8*24 | | 4h-12=16 | | 7/3*24 | | 98*x=120*(98*2) | | 5=q/-2-5 | | (4r^3+4r)-(3r^3-2r)=0 | | (3x+5u)(7x-5u-4)=0 | | 15x=-450 | | 5n+20=7n | | 3x+8.5=12.6 | | 3x/6=15 | | -6-2+3-9=6 |

Equations solver categories