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Popular >

simplify (2+9i)(2-9i)

Solution

simplify

(2 + 9 i) (2 - 9 i)

Solution

85

Solution steps

(2 + 9 i) (2 - 9 i)

Apply complex arithmetic rule:

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

= 2^{2} + 9^{2}

2^{2} + 9^{2} = 85

= 85

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Frequently Asked Questions (FAQ)

What is (2+9i)(2-9i) ?
The solution to (2+9i)(2-9i) is 85