Answer:
x^4 + 4x^3 + 8x^2 + 8x -5
Step-by-step explanation:
To make the product of two polynomials, simply apply the distributive property of multiplication, as follows:
(x^2 + 2x - 1)*(x^2 + 2x + 5)
x^2*x^2 + x^2*2x + x^2*5 + 2x*x^2 + 2x*2x + 2x*5 - 1*x^2 - 1*2x - 1*5
x^4 + 2x^3 + 5x^2 + 2x^3 + 4x^2 + 10x - x^2 - 2x - 5
x^4 + 4x^3 + 8x^2 + 8x -5
