3x squared = 10x + 48

1) 3x squared = 10x + 48
a. x = _____________ (Simplify your answer. Type an exact answer, using radicals as needed. Use integers for fractions for any numbers in the expression. Use a comma to separate answers as needed.)
b. The solution is not a real number.

2)
(1 - 4a) (1 - 5a) = __________

3) x cubed + 9x squared
_______________________
x squared + 6x - 27
a) The simplified solution is: _____________
b) The expression cannot be simplified.