Question

Polynomial standard form (9 + m)(-m + 9)

Answer 1

Answer:

Step-by-step explanation:

(9 + m)(-m + 9) = (9 + m)(9 - m)      {(a+b)(a-b) = a²  - b²}

                       = 9² - m²

                       = 81 - m²

                       = -m² + 81

Answer 2

Answer: -m^2+81

 

I used the foil method

(9+m)(-m+9)

first: 9*-m=-9m

second: 9*9=81

third: m*-m=-m^2

forth: m*9= 9m

then you do this:    -9m+81-m^2

                             +9m

                              ------------------

                                     81-m^2

then you set at the decending powers of x. which will give you: -m^2+81