Help ASAP will mark brainlist​

Asked 9 months ago
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Help ASAP will mark brainlist​

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Hi there!

\large\boxed{-40 + 20i}

Recall the rules for the imaginary number "i":

i = √-1          i² = -1

Given:

(5i) (5i) + (5i) (4 + 3i)

Multiply:

(25i²) + 20i + 15i²

Simplify using the rule above:

25(-1) + 20i + 15(-1)

-25 + 20i - 15

-40 + 20i

a = -40

b = 20

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answered 9 months ago