Question

Find:-

i) square of 6x-4y
ii) cube of 2a + 3b​

Answer 1

i) ( 6x - 4y )² = 36x² + 16y² - 2 ( 6x )( 4y )

= 36x² + 16y² - 48xy

ii) ( 2a + 3b )³ = 8a³ + 3 ( 2a )²( 3b ) + 3 ( 2a )( 3b )² + 27b³

= 8a³ + 36a²b + 54ab² + 27b³

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Answer 2

Step-by-step explanation:

1. (6x - 4y)2

= 36x2 + 16y2 - 48xy

2. (2a + 3b )3

=> 8a3 + 27b3 + 18ab

=>1 st applying (a- b)2 formula

=> 2 nd apply ing ( a + b )3. formula