What is true about the sum of the two polynomials? 6s2t – 2st2 4s2t – 3st2

  is the required sum of two given polynomials.

Step-by-step explanation:

We have been given the two polynomials

one is  say  

And say

When  we  add  these two  polynomial  P(x)+F(x)

  is the required sum of two given polynomials

Sum is of degree 2.

b

step-by-step explanation:

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81