Question

express the perimeter of the triangle as a polynomial side 1:) 2x-3 side 2:)x-12 side 3:)7x+1

Answer 1

perimeter = sum of all the sides

so you just add up all the sides...ie the 3 expressions

Answer 2

so would it be... 9x-14

Answer 3

well focus on the x terms

Answer 4

add up 2x, x and 7x to get _____

Answer 5

9x^3?

Answer 6

2x+x is 3x

3x+7x = 10x

Answer 7

so....

2x+x+7x is 10x

Answer 8

you do NOT say x+x is x^2

or

x+x+x = x^3

that's not correct

Answer 9

ok I for got that just x is the same as 1x. so the answer is 10x-14

Answer 10

yep

Answer 11

forgot*

Answer 12

just remember that saying

x+x

is like saying " i have one thing...then I add another thing....so I now have two things total"

Answer 13

also what determines a polynomial? ex. which expression is a polynomial
1) \[\frac{ 3 }{\sqrt{x} }\] 2) \[\frac{ 2 }{ x }+3x\] 3)\[\sqrt{x} -6\] 4)\[x-\sqrt{6}\]

Answer 14

if you're dividing by a variable, then it's NOT a polynomial

if the exponent over the variable isn't a whole number, then it's NOT a polynomial

Answer 15

if you have square roots over the variable, then it's NOT a polynomial

Answer 16

so #2 is a polynomial?

Answer 17

are you dividing by a variable in #2 ?

Answer 18

ie...is a variable in the denominator

Answer 19

so not 1 or 2 but 4?

Answer 20

yep, there is a square root...but it's not over the variable

Answer 21

OK