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Popular >

simplify (20+21i)(20-21i)

Solution

simplify

(20 + 21 i) (20 - 21 i)

Solution

841

Solution steps

(20 + 21 i) (20 - 21 i)

Apply complex arithmetic rule:

(a + bi) (a - bi) = a^{2} + b^{2}

= 2 0^{2} + 2 1^{2}

2 0^{2} + 2 1^{2} = 841

= 841

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Frequently Asked Questions (FAQ)

What is (20+21i)(20-21i) ?
The solution to (20+21i)(20-21i) is 841