37. Factorise the following using appropriate identity,
a) 4a²+20ab +25b²
b) 36x²-84xy +49y²
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Answer:
a) 4a²+20ab +25b²
(2a)² + 2 x 2a x 5b + (5b)² {identity: (a+b)²}
= (2a + 5b)²
b) 36x²-84xy +49y²
(6x)² - 2 x 6x x 7y + (7y)² {identity: (a-b)²}
( 6x - 7y)²
HOPE IT HELPS!!!
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