Polynominals

Question 1

-3x2 * y3

What is the degree and what is the coefficient?

Answer 1

degree is 5 and coefficient is -3. Degree is sum of exponents and coefficient is the number infront

Question 2

Write in descending order:

4y+3y2+2y4-9

Answer 2

descending order refers to the degree.

2y4+3y2+4y-9

Question 3

Subtracting Polynominals

2x2+9x-5)-(9x2+3x-5

Answer 3

intuively, squared minus squared and so on …. or
infront of the 2nd polynominal comes a 1, so negative one, which has to be outmultiplied with the in parantheses standing 2nd polynominal. The first one stays untouched

(2x2+9x-5)-1(9x2+3x-5)
2x2+9x-5-9x2-3x+5

Question 4

(4x2 y3)(5x3 y5)=

Answer 4

20x5+y8

Question 5

4x(x**2-2x+5)

Answer 5

4x3-8x2+20x

Question 6

Product of Polynominals:

(3x+7)(2x+3)=

Answer 6

3x(2x+3)+7(2x+3) then calculate

Question 7

(2x+5)**2=

Answer 7

This is a polynominal, so don´t!! just square whats in parentheses. Instead:
(2x+5)(2x+5)

Question 8

(4r2 s3)2
__________
8r3 s**4

Answer 8

42 r4 s6
__________ = 2rs2
8r3 s4