How do you simplify (-6-8i)(-3+8i)?

zagonek34

zagonek34

Answered question

2022-01-16

How do you simplify (68i)(3+8i)?

Answer & Explanation

Annie Gonzalez

Annie Gonzalez

Beginner2022-01-17Added 41 answers

You can just multiply everything out as in regular brackets, remembering that i2=1
So the expansion of (68i)(3+8i) is:
(6)(3)+(6)(8i)+(8i)(3)+(8i)(8i)
=1848i+24i64i2
=1864i2+(48+24)i
=18+(64)(1)24i
=18+6424i
=8224i
jgardner33v4

jgardner33v4

Beginner2022-01-18Added 35 answers

Explanation:
expand the brackets using FOIL
(68i)(3+8i)
=1848i+24i64i2i2=1
=1824i+64
=8224i

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