Question

разложите на множители

Answer 1

az² - bz² - bz + az - a + b = (az² - bz²) + (az - bz) - (a - b) =

= z²(a - b) + z(a - b) - (a - b) = (a - b)(z² + z - 1)

Answer 2

az²-bz²-bz+az-a+b = a(z²+z-1)-b(z²+z-1)=(z²+z-1)(a-b)