The sides with square root of 70 would be 8.366600265340755. The side with the square root of 28 will be 5.291502622129181. Simplify the two square roots square root of 70=8.36 square root of 28= 5.29
Use these simplified square roots and put them in with the formula and you should get your answer. Hope this helps Plz mark as brainlest :) Thank you!