30. 9a2 +6a +1-36b2
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Answer:
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Answer:
Answer
Given : 9a
2
+6a+1−36b
2
We can further write its as
9a
2
+6a+1−36b
2
=(9a
2
+6a+1)−36b
2
So we get
9a
2
+6a+1−36b
2
=[(3a)
2
+2×3×1+1
2
]−(6b)
2
9a
2
+6a+1−36b
2
=(3a+1)
2
−(6b)
2
Based on the equation a
2
−b
2
=(a+b)(a−b)
We get,
9a
2
+6a+1−36b
2
=(3a+1+6b)(3a+1−6b)