Get the answer to "How do you simplify 5i⋅i?" - Plainmath

b2sonicxh

Answered question

2022-01-15

How do you simplify

5 i \cdot i

?

Answer & Explanation

lovagwb

Beginner2022-01-16Added 50 answers

Solution:

5 i \cdot - i

= 5 i - 1 i

= (5 \cdot (- 1)) \times (i \cdot i)

= (- 5) \times (- 1)

= 5

Debbie Moore

Beginner2022-01-17Added 43 answers

Explanation:
The product is

5 i \times - i = - 5 i^{2}

Reminder

i^{2} = {(\sqrt{- 1})}^{2} = - 1

\Rightarrow - 5 i^{2} = - 5 \times - 1 = 5

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