Rectangle $PQRS$ is divided into eight squares, as shown. The side length of each shaded square is $10.$ What is the length of the side of the largest square?

|2x - 6| > 10 {x|x < -8 or x > 2} {x|x < -2 or x > 8} {x|-2 < x < 8}

Joline is solving the equation 0=x^2-5x-4 using the quadratic formula which value is the negative real number solution to her quadratic equation round to the nearest tenth if necessary

Could someone me with this, ? : )