Question

ques 14--factorize-9x²-25y²
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Answer 1

(9x-25y)(9x+25y) USING identity

Answer 2

Answer:

9x² - 25y² = 3²x² - 5²y²

= (3x)² - (5y)² [ we have applied the rule a² b² = (ab)² ]

= (3x + 5y)(3x - 5y) [ we have applied the rule X² - Y² = (X + Y) (X - Y) ]