4x^4-9x^2+8=0

Simple and best practice solution for 4x^4-9x^2+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 4x^4-9x^2+8=0 equation:


Simplifying
4x4 + -9x2 + 8 = 0

Reorder the terms:
8 + -9x2 + 4x4 = 0

Solving
8 + -9x2 + 4x4 = 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 + -2.25x2 + x4 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -2.25x2 + -2 + x4 = 0 + -2

Reorder the terms:
2 + -2 + -2.25x2 + x4 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -2.25x2 + x4 = 0 + -2
-2.25x2 + x4 = 0 + -2

Combine like terms: 0 + -2 = -2
-2.25x2 + x4 = -2

The x term is -2.25x2.  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.
-2.25x2 + 1.265625 + x4 = -2 + 1.265625

Reorder the terms:
1.265625 + -2.25x2 + x4 = -2 + 1.265625

Combine like terms: -2 + 1.265625 = -0.734375
1.265625 + -2.25x2 + x4 = -0.734375

Factor a perfect square on the left side:
(x2 + -1.125)(x2 + -1.125) = -0.734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 9n^2-5n+8=0 | | 5y-8+y+46=7y+40-3y | | 2/3k-42=-32 | | (4/5)=-(4/7)g | | 7q-(5q+5)=9-(5q-6) | | -1/2+y=-4/7 | | 3-2x=87 | | 2x+5=-42 | | 5*2+2y=10 | | (2x+5)2+49=0 | | m+3x-2=7 | | 45=-3(21-y)+3(y-2) | | -8=(4/5)k | | 5x=3(x-2)+58 | | 4/-3=43 | | (1/3)x=(1/2) | | 4/3=43 | | (3x+4)+4=(5x-4) | | 56=8a | | 9(x-2)=4x+2 | | 4m+4=-5n | | 48x^7=75x^9 | | 45r=1395 | | 4=c+15 | | -3Y+17=-11+7Y | | 150m-125m+33600=35525+50m | | 16-(-15)+x=21 | | 15v=825 | | a-11=19 | | -23i^2+4i-20=0 | | -4s+2(3+d)=-14 | | 12=z+9 |

Equations solver categories