triangle ABC with segment BD where point D is between points C and A, BC equals x, BD equals y, CD equals w, DA equals z, and BA equals v
What expression represents the value of x?
A. x equals the square root of quantity w times the sum of w plus z end quantity
B. x equals the square root of quantity z times the sum of w plus z end quantity
C. x equals the square root of quantity w times y end quantity
D. x equals the square root of quantity w times z end quantity
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