Q. 4 D5.0( 1 Vote )

Find out the following squares by using the identities:

(5x – 4)2

Answer :

Given (5x – 4)2


We know that


(a– b)2 = a2 + b2 – 2a×b


(5x – 4)2 = ((5x)2 + (4)2 – 2×5x×4)


(5x – 4)2 = 25x2 + 16 – 40x


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