In the *xy*-plane, the function $$h(x) = 3x^3 - ax^2 + bx + 4$$, where *b* is a constant, crosses the *x*-axis at $$(r, 0)$$, $$(4, 0)$$, and $$(1, 0)$$. What is the value of $$a + b$$?

Question 4 - Math: Calculator Practice Test for the SAT Exam

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