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Popular >

simplify (3i)(-i)

Solution

simplify

(3 i) (- i)

Solution

3

Solution steps

(3 i) (- i)

Apply rule:

a (- b) = - ab

(3 i) (- i) = - 3 ii

= - 3 ii

Apply exponent rule:

aa = a^{2}

ii = i^{2}

= - 3 i^{2}

Apply imaginary number rule:

i^{2} = - 1

= - 3 (- 1)

Multiply the numbers:

- 3 (- 1) = 3

= 3

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Frequently Asked Questions (FAQ)

What is (3i)(-i) ?
The solution to (3i)(-i) is 3