[ 125x3 + 8y3 ] is not a question or an equation, and it doesn't require an answer
or a solution. It's simply an expression that represents a number. The value of the
number depends on the values of 'x' and 'y', which of course you haven't included,
and it changes in a flash any time either of them changes.
17
There are an infinite number of real solutions. For example, x = 1, y = 1 and z = cuberoot(2), or x = 1, y = 2 and z = cuberoot(9). There are no integer solutions, as proven by Fermat's Last Theorem.
1 cubed = 13 = 1x1x1 = 1 2 cubed = 23 = 2x2x2 = 8 3 cubed = 33 = 3x3x3 = 27 4 cubed = 43 = 4x4x4 = 64 5 cubed = 53 = 5x5x5 = 125
15 cubed = 3,375
squared is 49. Cubed is 343.
Not sure which you mean, take your pick: (8y)3+27=(8y+3)((8y)2-3*(8y)+9)=(8y+3)(64y2-24y+9); or 8y3+27=(2y+3)(4y2-6y+9)
19
The LCM is 72y^3.
9x plus 8y
72y
The answer is 84128.
-6
3x + 2x - 8 = 125x - 8 = 125x = 20x = 4
The LCM is 40y3
2x = -7 - 8y
3(3y + 2) + 8y 9y + 6 + 8y 17y + 6
2y+8y = 10y