Respuesta :

A = ¹/₂bh
A = ¹/₂(4z² - 10)(8z)
A = ¹/₂[4z²(8z) - 10(8z)]
A = ¹/₂(32z³ - 80z)
A = ¹/₂(32z³) - ¹/₂(80z)
A = 16z³ - 40z