Question

Factorise x²y²- 4²
Factorise u²- 16
Factorise x⁴- y⁴
Factorise 2²- t²

Answer 1

Answer:

I'm answering only first one

ans : (xy + 4) (xy - 4)

Step-by-step explanation:

(xy)^2 - (4)^2

using :

a^2 - b^2 = (a + b) (a - b)

(xy + 4) (xy - 4)

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Answer 2

Step-by-step explanation:

(xy+4)(xy-4)

(u+4)(u-4)

(x²+y²)(x+y)(x-y)

(2+t)(2-t)