Question

expand the term
(7x^2-4)^2

Answer 1

Hey Friend☺

we know that

( a - b )^2 = a^2 - 2ab + b^3

So

( 7x^2 - 4 )^2 = ( 7x^2)^2 - 2 ( 7x^2 )( 4 ) + ( 4 )^2

= 49x^4 - 56x^2 + 16

Hope it helps you ..!!

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