Sums and products of rational and irrational numbers (K-A)

Proof: product of rational & irrational is irrational (K-A)

Proof: sum & product of two rationals is rational (K-A)

Proof: sum of rational & irrational is irrational (K-A)

Sums and products of irrational numbers (K-A)

Worked example: rational vs. irrational expressions (K-A)

Worked example: rational vs. irrational expressions (unknowns) (K-A)