24-(6+3) in words and can be in a word problems

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given

Find the root(s) of f (x) = (x- 6)2(x + 2)2.