What must be added to 4x2 – 4 to make it a perfect square?
-
A.
(frac{-1}{x^2}) -
B.
(frac{1}{x^2}) -
C.
1 -
D.
-1
Correct Answer: Option B
Explanation
(2x (frac{-1}{4})2 = 4x2 + (frac{1}{x^2}) – 4
what must be added is +(frac{1}{x^2})
(2x (frac{-1}{4})2 = 4x2 + (frac{1}{x^2}) – 4
what must be added is +(frac{1}{x^2})