Which expression is equivalent to this polynomial? 4x^2 + 27

If square root x = -7, then x= -49 true or false

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)

The mean average cost of standard room per night at a hostel is ? 20.60. therefore, how much does a standard room cost per night at night-time rest days?