5.
Find the following products :
(a) (a + 3b) (a²-3ab + 9b square) (b) (25x²+15xy+9y square (5x-3x)
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Answer:
A.
(a+3b)(a²-3ab+9b²)
a³-3a²b+9ab²+3a²b-9ab²+27b³
a³+27b³
(a)³+ (3b)³
B.
(25x²+15xy+9y²)(5x-3y)
125x³+75x²y-45xy²-75x²y-45xy²-27y³
125x³-27y³
(5x)³- (3y)³
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