Question

The expression (4x + y )(4x – y ) can be simplified as __________.
a) 8x+8xy+y2
b) 8x2+16xy-y2
c) 16x2-y2
d) 16x2+y2

with solution​

Answer 1

correct answer is the option 'c'

(4x + y)4x - y)= (4x)²- (y)²

=16x²- y²

The identity used is:

(x+y)(x-y)=x²-y²

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