Polynomials

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Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is -2. Find a and b. (4 marks)

Please help, I understand what to do when there's only 2 variables but not with 3. Thank you!

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