(11) Find (7a - 5b) (49a^2 +35ab + 25b^2)
Answers
Answered by
35
Answer:
[(7a)^3-(5b)^3]
Step-by-step explanation:
(a^3-b^3)=(a-b)(a^2+ab+b^2)
Hence, (7a-5b)(49a^2+35ab+25b^2)
=(7a-5b)[(7a)^2+(7a*5b)+(5b)^2]
=[(7a)^3-(5b)^3]
where, a=(7a)^3 and b=(5b)^3
HOPE IT WORKS
Answered by
6
Answer:
7a−5b)(49a
2
+35ab+25b
2
)
=(7a−5b)((7a)
2
+7a×5b+(5b)
2
)
=(7a)
3
−(5b)
3
=343a
3
−125b
3
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