Question

factorise the following expressions:
1)y²-4​

Answer 1

Step-by-step explanation:

y²-4

=(y)² - (2)²

=(y+2)(y-2) { Because a²-b² =(a+b)(a-b) }

Hope it helps

Answer 2

Answer:

There are three laws of factorization. The one law here applied is the third law which is a^2 - b^2 = (a+b)(a-b)

y is y^2

2 is 4

So the answer is (y+2)(y-4)

Step-by-step explanation:

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