What is (sqrt(-5)+2sqrt(20))(-sqrt(-5)) ?

The solution to (sqrt(-5)+2sqrt(20))(-sqrt(-5)) is 5-20i

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simplify (sqrt(-5)+2sqrt(20))(-sqrt(-5))

simplify

(- 5 + 220) (- - 5)

5 - 20 i

Solution steps

(- 5 + 220) (- - 5)

Apply rule:

a (- b) = - ab

(- 5 + 220) (- - 5) = - (- 5 + 220) - 5

= - (- 5 + 220) - 5

Expand

- 5 (- 5 + 220) : - 5 + 20 i

= - (- 5 + 20 i)

Remove parentheses:

- (a + bi) = - a - bi

= - (- 5) - 20 i

Apply rule:

- (- a) = a

- (- 5) = 5

= 5 - 20 i

\frac{36 x ^{5} + 9 x ^{2}}{3 x}

\frac{\frac{21 m ^{7}}{8 n ^{3}}}{\frac{7 m ^{8}}{12 n ^{4}}}

- i^{5}

\frac{x + 2}{3 x} + \frac{x ^{2} - 2}{5 x ^{2}} + \frac{2 - x ^{3}}{9 x ^{3}}

1.5 \times 3

What is (sqrt(-5)+2sqrt(20))(-sqrt(-5)) ?
The solution to (sqrt(-5)+2sqrt(20))(-sqrt(-5)) is 5-20i