ID: Class: 11 Subject: Math Topic: Complex number and quadratic equation Type: Subjective

Question:

If $(a + ib)(c + id)(e + if)(g + ih) = A + iB$, then show that $(a^2 + b^2)(c^2 + d^2)(e^2 + f^2)(g^2 + h^2) = A^2 + B^2$.