<PRE><B>Question 203423</B>
Expand and simlify
(a)  -3(x² - xy + 2y²)	
    -3x²+3xy-6y²
(b)  (x – 1)(x + 4)
     x²+4x
       -x -4
---------------------
     x²+3x-4
(c)  -2(x + 3)(2x – 1)
     -2x-6 (2x-1)
      -4x²+2x
          -12x+6
--------------------
      -4x²-10x+6
(d)  (2x – y)²
      (2x-y)(2x-y)
    4x²-2xy
       -2xy+y²
------------------
    4x²-4xy+y²
(e)  (2x + 3)(3x – 2) – (x + 5)²
    (2x+3)(3x-2)-(x+5)(x+5)
1.) (2x+3)(3x-2)
     6x²-4x
         9x-2
---------------
     6x²+5x-2
2.) (x+5)(x+5)
   x²+5x
      5x+25
----------------
   x²+10x+25
3.)(6x²+5x+2)-(x²+10+25)
     6x²+5x+2
   - x²+10x+25
---------------
     5x²-5x-20</PRE>