The expression (11.98 × 11.98 + 11.98 × x + 0.02 × 0.02) will be a perfect square for x equal to	Pick:
A) 0.02  B) 0.2  C) 0.04  D) 0.4  E) 4
Solution   Given expression = (11.98)2 + (0.02)2 + 11.98 × x.   For the given express 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 × 11.98 + 11.98 × x + 0.02 × 0.02) will be a perfect square for x equal to