Choose all methods below that could possibly be used to find the derivative of y = (x² - 3x +4)².
a. Write the function as y = (x² - 3x + 4)(x² - 3x + 4), and use the product rule.
b. Write the function as y = (x² - 3x + 4)(x² - 3x + 4), distribute to eliminate parentheses, and use the powers of x rule.
c. Use the power rule with n = 2, inner function u(x) = x² - 3x + 4, and outer function ƒ(u) = u²
d. Write the function as y = x⁴ + 9x + 16, and use the powers of x rule.
