Solving quadratic equations and the Pythagorean theorem

Solve x²-1=80

• 81

• 9

• -9

• 9,-9

Solve 10x²+9=499

• 499

• 20

• 20,-20

• -20

Solve (x-4)²=5

• 4+√5, 4-√5

• -√5

• √5

• 4+√5

Solve 2(x+6)²=18

• √18

• 3,-15

• 3

• 9,-9

Find the missing side of the triangle with one leg equal to 3 and the other equal to 4

• √7

• 49

• 25

• 5

Find the missing leg of the triangle when on leg equals 4 and the hypotenuse equals 9

• 97

• √65

• √97

• 65

Find the missing side of the triangle when one leg equals 8, and the other leg equals 15

• 17

• √23

• 23

• 289