**If α and β are the zeros of the quadratic polynomial f(x) = x2 - px + q, prove that a2/b2 + b2/a2 = p4/q2 - 4p2/q + 2**

Given that *α* and *β* are the zeroes of the quadratic polynomial *f* ( *x* ) = *x* ^{2} – *px* + *q*

**In the given solution how did (a**

^{2}+ b^{2})^{2}- 2a^{2}b^{2}/ a^{2}b^{2 }changed into [(a + b)^{2}- 2ab ]^{2 }- 2(ab)^{2}/ (ab)^{2}**i didnt understand how -2a**

^{2}b^{2}/ a^{2}b^{2 }change to^{ }- 2(ab)^{2}/ (ab)^{2 }bcoz a^{2}b^{2}and (ab)^{2}are two different things. I guess !!**i m confused..plzz help...**