Question

factorise x ²+4xy+4y²-9z²​

Answer 1

Answer:

It can be re-written as

=(-x)² + (2y)² + (-3z)² -2(-x)(2y) -2(2y)(-3z) -2(-3z)(-x)

We can observe it is the formula ( a + b + b )²

So, it can be factorized as (-x + 2y -3z)²

Step-by-step explanation:

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