4.6 because you round up because the next number is less than 5
OK.
-- Since it's the difference of two squares,
the factored form of that expression is
(5x + 12) (5x - 12) .
-- We don't know the value of the expression
until you tell us the value of 'x'. And then, if
'x' changes, the value of the expression also
changes, immediately, without any delay.
Faster than the speed of light.
