Question

Factorise a^2 + 1/a^2 - 11

Answer 1

Answer:

x2+1x2−11=x2+1x2+2(x)(1x)−2−11

=(x+1x)2−(√13)2

=(x+1x+√13)(x+1x−√13)

Using x2−y2=(x+y)(x−y)

Answer 2

Answer:

sorry i don't know sorry