1.

ample 18: Factorise(i) 49a2 + 70ab 25b(ii) 5 - yi4.

Answer»

i) 49a² + 70ab + 25b²

(7a)² + 2 × 7a × 5b + (5b)²

(7a + 5b)²

ii)

25x²/4 - y²/9

(5x/2)² - (y/3)²

(5x/2 - y/3) ( 5x/2 + y/3)



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