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Popular >

simplify (7-9i)(7+9i)

Solution

simplify

(7 - 9 i) (7 + 9 i)

Solution

130

Solution steps

(7 - 9 i) (7 + 9 i)

Apply complex arithmetic rule:

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

= 7^{2} + (- 9)^{2}

7^{2} + (- 9)^{2} = 130

= 130

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Frequently Asked Questions (FAQ)

What is (7-9i)(7+9i) ?
The solution to (7-9i)(7+9i) is 130