Multiply the polynomials (5x^2 + 2x + 8) (7x7 - 6)

If you mean the "x" is multiply, then your answer is 35x9+14x8+56x7-30x2-12x-48

Explanation:

= (5x2+2x+8) (7x7+-6)

= (5x2) (7x7) + (5x2) (-6) + (2x) (7x7) + (2x) (-6) + (8) (7x7) + (8) (-6)

=35x9-30x2+14x8-12x+56x7-48

=35x9+14x8+56x7-30x2-12x-48