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What is the value of c so that x^2 -11x + c is a perfect-square trinomial?

A. 121
B. 121/4
C. -11/2
D. 121/2

1 answer

The value of c so that x^2 -11x + c is a perfect-square trinomial can be found by taking half of the coefficient of x (in this case, -11) and squaring it.

So, c = (-11/2)^2 = 121/4

Therefore, the correct answer is:

B. 121/4
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