Answer:
sq root of 6 divided by 2
Step-by-step explanation:
use pythagorean theorem: square of each leg equals the square of the hypotenuse
x squared plus x squared = radical three squared
2x² = 3
x² = 
x = square root of 3/2
rationalize the denominator to get sq root of 6 divided by 2
2x² + 3x - 5 = 0
a=2, b=3, c=-5
D = b² - 4ac = 3² - 4*2*(-5) = 9 + 40 = 49
63.58 percent or 63.6 percent