Question

till the answer of expand ​

Answer 1

using identity= (a-b)^2 = a^2 + 2ab+ b^2

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

=x^2 - 8 + 16 / x ^2

Answer 2

Answer:

(a-b)2=a2-2ab+b2

(x-4/x)2

x2-2into x into 4/x

x2-8-16/x2

=-24

answer -24