Please help lol its about size of divisor

Can someone me with these two circle theorem questions asap?

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?