Suppose that j = 4, a = j + 7 and z = a + 5. What is the value of jaz^2?
jaz^2 = (4) (a+7) (a + 5)^2 =
4 ( a + 7) (a^2 + 10a + 25) =
(4a + 28) (a^2 + 10a + 25) =
4a^3 + 40a^2 + 100a
+ 28a^2 + 280a + 700
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4a^3 + 68a^2 + 380a + 700
