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Simplify the variable expression below as much as possible8x plus 4 plus 8x - 1?
You have the following expression:8x + 4 + 8x - 18x, 4, 8x, and -1 are each terms, and are being added together. Think of each term as an individual box or package. The "boxes" with no variable (in this case, x), which are 4 and -1, can be added normally, but CANNOT be added to the "boxes" with variables. The ones with variables in them are added normally, but CANNOT be added to "boxes" without variables.Using this information, we know that:4 + (-1) = 3and8x + 8x = 16x (think of 8 + 8 = 16, but labeled with variables)We can say that the numbers are being added together, but we can't actually add them together. So we can say:16x + 3but we can't say:19xor19So, the answer is:16x + 3
What is the number that precedes a variable called?
It called the coefficient of a variable. As an example 16x. 16 would be the coefficient and x would be the variable or term.
What is the square root of 16x squared?
If you square an expression and then take the square root, the squaring and the square root cancel one another, EXCEPT that the sign will be positive. Thus, if you square 16x, and then take the square root, the answer can be 16x or -16x, depending on whether "x" is positive or negative. Or if you only square x, and then take the square root of the entire expression, it would be 4x or -4x (once again, depending on whether "x" is positive or negative).
What is the cubed root of -16x to the 12th power?
[(-16x)12]1/3 = (-16x)4 = 65536x4
X2 - 16x plus 28?
Oh, dude, you've thrown me back to high school math class with that one. So, X2 - 16x + 28 is a quadratic expression that can be factored as (X - 14)(X - 2). That's like the math version of solving a puzzle, but like, who even uses this stuff in real life, am I right?
