Rewrite explicitly giving the elements in each set:?

Question

a) A = {x: x is a letter in the word 'mathematics"}
b) B = {x: 3x² - √20 x - 5 = 0, x is real numbers}

Answer 1

a) A = {m, a, t, h, e, i, c, s}

b) resolving the equation, we have
B = { sqrt(5) , - sqrt(5)/3 }