Okay, I will try and put this all together here. "So basically there could be more than one habitable zone in a solar system that has a smaller star orbiting the larger star. Lets say a planet was outside of the normal habitable zone of our sun, somewhere around Jupiter, but the second sun orbited the first sun at the same distance that Pluto orbits our Sun. Could both stars provide enough light and heat for life to exist on the planet?"
Rod's note. M1 = 1 solar mass, the Sun. M2 = 0.75 solar mass, the smaller star. Semimajor axis = 39 a.u. so the period is about 184 years for both stars to move around the barycenter using Kepler’s 3rd law in a binary star relationship. The planet is orbiting M1 near 5 a.u. so the planet period like Jupiter, close to 12-year period about M1. M2 as a main sequence star is 4500 K surface temperature so peak radiation (Wien black body law) emitted near 644 nm, orange end of the spectrum compared to M1, the Sun in the yellow. M2 emits less energy than the Sun, and the planet is still 34 a.u. from M2 star. The planet is also some 5 a.u. from M1 so similar to Jupiter's solar energy window in our solar system.