How do i complete the square for x^2 + 6x - 5 = 0?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Given that abcd is a rhombus, what is the value of x?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x