Find the total area of a round section of land that has a 2.5-foot-wide enclosure of pebbles surrounding a round garden of flowers.

a.) a = r + 5π

b.) a = πr + 2.5πr

c.) a = πr^2 + 6.25π

d.) a = πr^2 + 5πr + 6.25π

(π = pi)

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form