Find the product of the following algebraic expression using identities :
3 2 3 2
( 4 x + 5 y ) ( 4 x + 5 y )
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Answer:
16x²+20xy+20xy+25y²
ans 16x² +40xy+25y²
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Identity :
(a+b)^2 = a^2 + 2(ab) + b^2
= (4x)^2 + 2(4x * 5y) + (5y)^2
= 16x^2 + 40xy + 25y^2
Answer = 16^2 + 40xy + 25y^2
(a+b)^2 = a^2 + 2(ab) + b^2
= (4x)^2 + 2(4x * 5y) + (5y)^2
= 16x^2 + 40xy + 25y^2
Answer = 16^2 + 40xy + 25y^2
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