Question

expand (2x +5 ) (2x+4)
using algebraic identities​

Answer 1

Answer:

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

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USING IDENTITY :

( x + a ) ( x + b )

=> x² + x ( a + b ) + ab

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SOLUTION :

=> ( 2x )² + 2x ( 3 - 5 ) - ( 3 ) ( 5 )

=> 4x² + 2x ( - 2 ) - 15

=> 4x² - 4x - 15