Which set of numbers could represent the lengths of the sides of a right triangle?
9, 40, 41
8,9,10
2, 3, 4
12, 15, 20

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x -4 0 for x? cos -3+ v (3) 2-4() 2(5) 3+ |(3)² +4() 205) 3+ (3) 2-4() -3+ v (3)² +4()