Help please this is urgent

What is the quadric regression equation that fits these data

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Measures of the angle of r, 31 s (x+4) t (3x+9)