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Popular >

simplify 3i(-5+7i)

Solution

simplify

3 i (- 5 + 7 i)

Solution

- 21 - 15 i

Solution steps

3 i (- 5 + 7 i)

Apply the distributive law:

a (b + c) = ab + a c

3 i (- 5 + 7 i) = 3 i (- 5) + 3 i 7 i

= 3 i (- 5) + 3 i 7 i

3 i (- 5) = - 15 i

3 i 7 i = - 21

= - 15 i - 21

Rewrite in standard complex form:

- 21 - 15 i

= - 21 - 15 i

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Frequently Asked Questions (FAQ)

What is 3i(-5+7i) ?
The solution to 3i(-5+7i) is -21-15i