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Q.) If ( alpha, beta ) be the roots of the equation ( ax^2 + bx + c = 0 ), then the value of ( a alpha^2 + c}{ a alpha + beta} + {a beta^2 + c}{a beta + b} ) is:
[A]{b(b^2 - 2ac)}{4a}
[B](b^2 - 4ac)}/{2a})
[C]b(b^2-2ac)/a^2 c
[D]none of these