1.

(4x+5) (4x-1) F find the following squares by using the identities identities

Answer»

ANSWER:

on COMPARING it with formula (x+a) (x+b) = x²+(a+b) x +ab

we find that x= 4x , a=5 and b=-1

now putting these VALUES in this equation we get

(4x) ² + [5+(-1) ] x + 5×(-1)

now we get

16x² + (4) x + (-5)

we now get 16x² + 4x -5 as answer


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