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Popular >

simplify (3+9i)(3-9i)

Solution

simplify

(3 + 9 i) (3 - 9 i)

Solution

90

Solution steps

(3 + 9 i) (3 - 9 i)

Apply complex arithmetic rule:

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

= 3^{2} + 9^{2}

3^{2} + 9^{2} = 90

= 90

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Frequently Asked Questions (FAQ)

What is (3+9i)(3-9i) ?
The solution to (3+9i)(3-9i) is 90