Question

factorise : 4a²x²-25b²y²

Answer 1

rewrite 4a²x² as (2ax)²

rewrite 25b²y² as (5by)²

so,        (2ax)² - (5by)²

       Now, applying the formula of :

                    x²- y² = (x+y)(x-y)

     (2ax)² - (5by)² = (2ax + 5by)(2ax - 5by)

                             

so the answer is :

  (2ax + 5by)(2ax - 5by)

i hope it will helps you friend

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