Question

(5r-4)(r^2-6r+4) what is the product

Answer 1

5r^3-34r^2+44r-16

Explanation:

Answer 2

Distribute sum groups

5r(r^2 - 6r + 4) -4(r^2 - 6r + 4)

Distribute

5r^3 - 30r^2 + 20r - 4(r^2 - 6r + 4)

Distribute

5r^3 - 30r^2 + 20r - (4r^2 - 24r + 16)

Simplify brackets

5r^3 - 30r^2 + 20r - 4r^2 + 24r - 16

Collect like terms

5r^3 (-30r^2 - 4r^2) + (20 + 24r) - 16

Simplify

5r^3 - 34r^2 + 44r - 16