The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to: Choose the most appropriate option.
A) 0.02	B) 0.2	C) 0.04	D) 0.4	E) none
Given expression = (11.98)^2 + (0.02)^2 + 11.98 * x.   For the given expression to be a perfect square, we must have   11.98 * x = 2 * 11.98 * 0.02 or x = 0.04   Answer = 0.04
<result>C</result>
The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to: