a) x2 = 64

b) x2 = 144

c) x2 = 225

d) x + 1 = 50

e) x2 + 15 = 40

f) x² + 11 = 20

g) x2 - 4 = 60

h) x2 - 15 = 1

i) 2 x2 - 1 = 80

j) x2 - 5 = 620​