3. Simplify. State the non-permissible value(s). a. 45a'b'c 3x +12 12b' c (2 marks) b. - (2 marks) (3x+ 4)(x +4) 18-3m C. - (2 marks) 4n+8 d. m- -6m 2n2 _g (2 marks) 4. A student was asked to simplify the expression . Unfortunately, an error was made by 8x -x the student. Explain the error made, and simplify the expression correctly. (2 marks) Step 1 = x(x' -64) x(8-x) Step 2 - X(x+8) (x-8) x(8-x) Step 3 = * ( x+8) ( x-8 ) * (8- x ) Step 4 = x +8