2. Perform the following operations to find the terms to complete the blanks.
- 1
Part A: (a - 1)(1 + a + a²) =
- 49
Part B: [(x - y) + 7][(x - y) - 7] =
(y2 – 3x)
Part C: -5(3y+ - 4y2 + 7x)(y2 – 3x) =
+ 105x2
= -15y +
Part D: (3m - 2n)3 = (9m2 - 12mn +4n?).
= 27m3 -
+
- 8n3