Question

Factorise the following expressions:-

i) 25x²y² - 20xy²a + 4y²z²

ii) a²/b² + 2 + b²/a²​

Answer 1

Answer:

We know the identity a

2

−b

2

=(a+b)(a−b)

Using the above identity, the given expressiona

2

−b

2

−a+b can be factorised as follows:

a

2

−b

2

−a+b=[(a+b)(a−b)]−1(a−b)=(a−b)(a+b−1)

Hence, a

2

−b

2

−a+b=(a−b)(a+b−1)

Answer 2

Answer:

Above answer is correct...

Step-by-step explanation:

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