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X (or any letter) is a variable; you can not know the initial value unless the question specifically states what it is.
It can be manipulated into varying written forms; but the X notation itself will remain a variable.
When given a variable in the form of a letter; the only thing you can typically assume is that it is different from the other letters in the equation in some way or it would likely just have the same letter used multiple times throughout. (though this is not always an accurate assumption, there are cases where different letters end up being the same number, they just were not known at the start of the equation and are thus being represented by different variable letters)
Alternate written methods:
X to the third power = X^3 = (X)(X)(X)
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X cubed minus x cubed?
x^3 - x^3 = 0 Remember , whilst 'x' is an unknown value, that unkonwn is a fixed value. As a numerical example 3^(3) - 3^(3) = 27 - 27 = 0 The '3' is 'x' in this case
X cubed multiplied by x cubed?
x to the power of 6.
What is 2x cubed minus 50x?
Totally dependent on the value of x eg if x = 1 then answer is -48 If x = 10 then answer is 1500... If x = -5 answer is 0
How do you Convert 243 cm cubed to m cubed?
1 cm cubed = 1 cm X 1 cm X 1 cm 1 cm = .01 m, so 1 cm cubed = .01 m X .01 m X .01 m Therefore, 1 cm cubed = .000001 m cubed, and 243 cm cubed = 243 X .000001 = .000243 m cubed. In summary, multiply cm cubed by .000001 to get m cubed.
What is 4.6 cubed?
4.6 cubed = 4.63 = 4.6 x 4.6 x 4.6 = 97.336
