Question

$81x {}^{2} - 90xy + 25y \: value \: \: (x = 3).(y = 2)$
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Answer 1

Answer:

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Answer 2

Step-by-step explanation:

x = 3 ; y = 2

81x² - 90ny + 25 y

{using identity (a -b)² = a²-2ab+b²}

(9x)² - 2 (9x)(5y) + (5y)²

=> (9x-5y)²

(9(3) - 5(2))²

=> (27 - 10)²

=> 17²

=> 289