A) -√b B) 2b C) √b D) 2√b E) -2√b
answer is E) -2√b
multiply top and bottom by (√x + √b)
((b - x)(√x + √b)) / (x - b)
(-1(x - b)(√x + √b)) / (x - b) the (x - b) cancel out
-1(√x + √b)
-√x - √b
as x approaches b
-√b - √b = -2√b
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answer is E) -2√b
multiply top and bottom by (√x + √b)
((b - x)(√x + √b)) / (x - b)
(-1(x - b)(√x + √b)) / (x - b) the (x - b) cancel out
-1(√x + √b)
-√x - √b
as x approaches b
-√b - √b = -2√b