4x^2-9x=-9

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


Simplifying
4x2 + -9x = -9

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

Solving
-9x + 4x2 = -9

Solving for variable 'x'.

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

Combine like terms: -9 + 9 = 0
9 + -9x + 4x2 = 0

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

Divide each side by '4'.
2.25 + -2.25x + x2 = 0

Move the constant term to the right:

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

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

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

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

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = -2.25 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = -2.25 + 1.265625

Combine like terms: -2.25 + 1.265625 = -0.984375
1.265625 + -2.25x + x2 = -0.984375

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = -0.984375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| (9/2x)-(3/5x)=39/5 | | http://homework.cpm.org/cpm-homework/resources/CPM/CC/CCA/Ch6/6-116/376ff85c393957a2300713851b5b4360/CCA_1-116_cd.png | | 9/2x-3/5x=39/5 | | 0.11y+0.05(y+8000)=1840 | | 2x+3y=460 | | (4x^2+6x+2)+(9x^2+9x)= | | 16x^2-25y^2+64x-50y-361=0 | | x(9x+6)+1=0 | | (3x-8)+(-4x-2)= | | 1.1t=-33 | | X^4+8xi=0 | | 28=n+31 | | (5-x)^(1/2)-2x=0 | | x+30=26 | | (5-x)^1/2-2x=0 | | y=5(3a+10b) | | 37-5ln(2m+9)=16 | | 2.7=x-1.8 | | 8-5m+3m= | | -24-3x-5x=0 | | 14+10=e+2 | | 14+19=e+2 | | x^4+7x^2=30 | | 3-6=x | | 4(y+1)=3(2y-2) | | 0=-4sin(4x) | | 4/3*3.14*216 | | 0=-4*sin(4x) | | y=-2x^2-7x-4 | | 1-3x-5+171=x | | 3(6c-1)-2=16c+3 | | Y=-5x^2+500 |

Equations solver categories