Question

5 x + 4 y whole square​

Answer 1

Answer:

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Answer 2

Answer:

= (5x + 4y) ^2

= (5x) ^2 + 2(5x)(4y) +(4y) ^2

=  25^2 +40 xy + 16 y^2.                

                                   {using the identity (a+b)^2 =a^2+2ab+b^2}