If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
81x2 + -18 + -7 = 0
Reorder the terms:
-18 + -7 + 81x2 = 0
Combine like terms: -18 + -7 = -25
-25 + 81x2 = 0
Solving
-25 + 81x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '25' to each side of the equation.
-25 + 25 + 81x2 = 0 + 25
Combine like terms: -25 + 25 = 0
0 + 81x2 = 0 + 25
81x2 = 0 + 25
Combine like terms: 0 + 25 = 25
81x2 = 25
Divide each side by '81'.
x2 = 0.3086419753
Simplifying
x2 = 0.3086419753
Take the square root of each side:
x = {-0.555555556, 0.555555556}
| x^3+2x^2+3x+1=0 | | y=0.05x^2-0x | | -7x+3=-9-5x | | .5x+5=2.5x-1 | | 3(t+5)+5(t-3)=6t+12 | | 32(x+2)=27x | | (X^3+6)= | | -2(4x-3)=4(7-3x) | | rx+1=5 | | x^2+21=-35 | | y+6=2(x-1) | | 25x^2+16y^2-50x-160y+325=0 | | Q=3-4+5+6 | | h(t)=-16t^2+6t+12 | | (5m+4)=(10n+4) | | -8x+16+x=3-5x | | A(x)=C(x) | | (2+x)+(2y)=22 | | 10x+1+7x=37 | | 8x^8=36x^4 | | -0.3t-9+5.8t=-6.25 | | 8g-7=2g+11 | | 8x(2x+3)=x+1 | | 25x+10x+1= | | 1+5(2-u)=u-1 | | 6x+(-90)=12x | | y=x^4-7x^9 | | 34x+28=x | | 4x^6=20x^3 | | 34857x+28=x | | y=x*tanx | | 2i-3-4i=16 |