(X+3 ) (x+4) solve with using identities
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( x + 3 ) ( x + 4 )
Identity : ( x + a ) ( x + b ) = x² + ( a + b ) x + ab
Here, a = 3 and b = 4
= x² + ( 3 + 4 ) x + ( 3 ) ( 4 )
= x² + 7x + 12
Identity : ( x + a ) ( x + b ) = x² + ( a + b ) x + ab
Here, a = 3 and b = 4
= x² + ( 3 + 4 ) x + ( 3 ) ( 4 )
= x² + 7x + 12
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