Question

need help with 3 through 20
Mostly explaining how to do the work. glencoe.com/sites/common_assets/mathematics/alg2_2010/worksheets/alg2hwp_72.pdf

Answer 1

In #3, are there any portions where you're dividing by a variable?

Answer 2

what?

Answer 3

look at #3

do you see any divisions by a variable

Answer 4

ex:

2/x is the number 2 divided by a variable

Answer 5

yes 2/m^2

Answer 6

so that invalidates it from being a polynomial

Answer 7

ie 2/m^2 is NOT a polynomial

Answer 8

because you can't divide by a variable if you want a polynomial

Answer 9

oh ok thx

Answer 10

for number 9, you replace every x with -2 and then you evaluate


\[\Large p(x) = x^4 + \frac{1}{2}x^3 - \frac{1}{2}x\]


\[\Large p(-2) = (-2)^4 + \frac{1}{2}(-2)^3 - \frac{1}{2}(-2)\]


\[\Large p(-2) = 16 + \frac{1}{2}(-8) - \frac{1}{2}(-2)\]


\[\Large p(-2) = 16 - 4 + 1\]


\[\Large p(-2) = 13\]

Answer 11

ok thx