i dont undertand it at all..
According to legend, the Pythagorean, Hippasus, who unveiled the concept of irrational numbers during a maritime expedition, was cast overboard by his peers "for introducing an element of the universe that contravenes the doctrine that all entities within the cosmos can be reduced to whole numbers and their relationships." Two millennia later, a similar fate befell complex (imaginary) numbers, which were first articulated by the Italian mathematician Cardano. He posited that "these intricate magnitudes are devoid of utility, albeit remarkably clever." Complex numbers can be expressed utilizing the so-called imaginary unit i, which satisfies the equation: i^2 = -1. Like real numbers, the imaginary unit can engage in arithmetic operations. For instance: (1 + 5i)^2 = 1 + 10i + (5i)^2 = 1 + 10i - 25. Based on this premise, please consolidate the equivalent expressions from the following lists: A) (3+2i)(3-2i) B) (1+i)^3 C) x^2-2x+4 ext{ at } x=1+i D) ext{sqrt}{4-13} Option 1) 2 Option 2) 3i Option 3) 13 Option 4) 2i - 2.