Please ! solve the following equation algebraically: 2x²=50

Find the value of x for which abcd must be a parallelogram -9-6x x-30

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.