Question

Hey:) can you please help me posted picture of question

Answer 1

We have the following expressions:
(5x2-4x-1) (7x2 + 9x + 8)
Resolving we have:
(35x4-28x3-7x2) + (45x3-36x2-9x) + (40x2-32x-8)
Adding similar terms we have:
(35x4 + 17x3-3x2-41x-8)
Answer:
The solution for this case is given by:
(35x4 + 17x3-3x2-41x-8)

Answer 2

Option B gives the correct answer.

The solution is listed below:


`(5 x^(2) -4x-1)(7 x^(2) +9x+8) \\ \\ =5 x^(2) (7 x^(2) +9x+8)-4x(7 x^(2) +9x+8)-1(7 x^(2) +9x+8) \\ \\ =35 x^(4)+45 x^(3)+40 x^(2) -28 x^(3)-36 x^(2) -32x-7 x^(2) -9x-8 \\ \\ =35 x^(4)+17 x^(3)-3 x^(2) -41x-8`