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Popular >

simplify (2-i)(2+i)

Solution

simplify

(2 - i) (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

Popular Examples

simplify e^{-100}simplify

e^{- 100}

factor 12x^4+8x^3+24 factor

12 x^{4} + 8 x^{3} + 24

x+(9(5+x))/5 =9-x

x + \frac{9 ( 5 + x )}{5} = 9 - x

14 > - 2 x + 4 > - 6

simplify 32^{(-2)/5}simplify

3 2^{\frac{- 2}{5}}

Frequently Asked Questions (FAQ)

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