x3 = x times x times x
3x = x plus x plus x
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The expression x - 3 is simply (3 - x) multipled by -1
Simply put, an expression does not need an equal sign, while an equation does. Equation: x+y=z Expression: x+y
It factors into (x-3)(x+3) as it follows the difference of squares rule. However, since you gave me an expression and not an equation, I cannot solve this expression beyond this point. If x^2-9=0. Then you can see that (x-3)=0 and (x+3)=0. Thus x=-3, 3.
It depends what "x" is. ======== An algebraic expression representing the difference (subtraction) between 6 and some unknown number (represented by x).
X = 15 - 5y