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If `alpha ` and `beta` are thr roots of the equation `ax^(2) + bx + c = 0` then `( alpha + beta )^(2)` is ……… .

A

`(-b^(2))/(a^(2))`

B

`(c^(2))/(a^(2))`

C

`(b^(2))/(a^(2))`

D

`(bc)/(a)`

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The correct Answer is:
C
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