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Factorise : x²-y²-9z²+6yz

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Factorise : x²-y²-9z²+6yz

Posted by Tanupreet Kaur 5 years, 1 month ago

CBSE > Class 08 > Mathematics

1 answers

Gaurav Seth 5 years, 1 month ago

x2 - y2 - 9 z2 + 6 y z
x2 - y2 - (3 z) 2 + 2 (y) (3 z)
x2 - (y - 3 z) ^2
a^2 - b^2 = a + b (a-b)
(x - y + 3 z ) (x + y - 3 z)

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