Digital ACT Math Practice Question #2011
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
(a+bi)(a-bi) = a^2 + b^2 = 7^2 + 1^2 = 50.
Multiplying complex conjugates: (a + bi)(a - bi) = a^2 - (b^2)(i^2) = a^2 + b^2 = 7^2 + 1^2 = 50....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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