Question

if a+b=4 and ab=3; find 1/b^2 +1/a^2

Answer 1

hey mate here is your answer
so 1/a²+1/b²=(a²+b²)/(ab)²
=((a+b)²-2ab)/(ab)²
now put the values
=((4)²-2(3))/(3)²
=10/9
hope it will help you
mark me brainliest

Answer 2

Answer:

$by \: taking \: lcm \\ \frac{1}{b^{2} } + \frac{1}{a ^{2} } = \frac{a ^{2} + b^{2}}{(ab)^{2} }$