Question

x^2-1/x=7......FIND VALUE OF x^2-1/x^2

Answer 1

Answer:

For part 1 = 6, and for part 2, = -1

Step-by-step explanation:

For part one of your question, (i.e $\frac{x^{2}-1 }{x} = 7$)

$\frac{x^{2}}{x}$ = x              (x^a/x^b = x^a-b)

Therefore, now we have x-1 = 7

= 7-1= x            (transposition method)

= x = 6

For part 2 of your question, $x^{2}$ and $x^{2}$ in the numerator and denominator cancel each other, therefore, answer is -1.