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Popular >

simplify (2-i)*(2+i)

Solution

simplify

(2 - i) \cdot (2 + i)

Solution

5

Solution steps

(2 - i) (2 + i)

Apply complex arithmetic rule:

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

= 2^{2} + (- 1)^{2}

2^{2} + (- 1)^{2} = 5

= 5

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Frequently Asked Questions (FAQ)

What is (2-i)*(2+i) ?
The solution to (2-i)*(2+i) is 5