D.6. What is the factored form of the polynomial function y = x + 3x - 10? A y = (x - 5)(x - 2) C. y = (x - 5)(x + 2) B. y = (x + 5)(x - 2) D. y = (x + 5)(x + 2) 7. The factored form of the polynomial function f(x) = x - 7x is... A f(x) = x(x-7) c. f(x) = -x(x2 + 7) B. f(x) = x(x + 7) D. f(x) = x(x2 - 7)