Evaluate using the identity (a + b)2 = a2 + 2ab + b2(3x – 5y)2

1.	Evaluate using the identity (a + b)2 = a2 + 2ab + b2(3x – 5y)2
Answer» (a – b)² = a² – 2ab + b² Here a = 3x, b = 5y (3x – 5y)² = (3x)² - (2)(3x)(5y) + (5y)² = 9x² – 30xy + 25y²

Answer»

(a – b)² = a² – 2ab + b²

Here a = 3x, b = 5y

(3x – 5y)² = (3x)² - (2)(3x)(5y) + (5y)²

= 9x² – 30xy + 25y²

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