What is the surface area of a square pyraimd that is 5.95cm long and 5.1 cm wide

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.

Need on this geometry question. explain how you did it.

On a cm grid, point p has coordinates (3,-1) and point q has coordinates (-5,6) calculate the shortest distance between p and q give your answer to 1 decimal place