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Preeti Tripathi

Class 9th
Maths
2 years ago

Factorise : 4x2 + 9y2 + 16z22 + 12xy – 24 yz – 16xz.

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Abhishek Mishra

2 years ago

Solution: 4x2 + 9y2 + 16z22 + 12xy – 24yz – 16xz = (2x)2 + (3y)2 + (-4z)2 + 2(2x)(3y) + 2(3y)(= 42) + 2(- 42)(2x) By using a2 + b2 + 2ab + 2bc + 2ca = (a + b + c)2, we obtain = (2x + 3y – 4z)2 = (2x + 3y – 4z) (2x + 3y – 4z)

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