Factorize x²+9y²+6xy-z²
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Answer:
The value of x
2
+6xy−z
2
+9y
2
is
= x
2
+6xy+9y
2
−z
2
= (x+3y)
2
−z
2
= (x+3y+z)(x+3y−z) ....By using a
2
−b
2
=(a−b)(a+b)