What is the value of b^2 - 4ac for the following equation? 5x2 + 7x = 6 9 81 169

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

What is the value of x? enter your answer in the box.