Question

PLS ANSWER DIS MATH PROBLEM!!!

Answer 1

There are a lot of math questions here. I'll do the first six questions (number 9 through 14) to get you started.

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Problem 9

`4i(-2-8i)\\\\4i(-2)+4i(-8i)\\\\-8i-32i^2\\\\-8i-32(-1)\\\\-8i+32\\\\32-8i`

Answer: 32 - 8i

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Problem 10

`5i*-i\\\\-5i^2\\\\-5(-1)\\\\5\\\\`

Answer: 5

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Problem 11

`5i*i*-2i\\\\-(5*2)i^2*i\\\\-10i^2*i\\\\-10(-1)*i\\\\10i\\\\`

Answer: 10i

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Problem 12

`-4i*5i\\\\-20i^2\\\\-20(-1)\\\\20\\\\`

Answer: 20

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Problem 13

`(-2-i)(4+i)\\\\x(4+i) \ \text{.... let x = -2-i}\\\\4x+xi\\\\4(x)+i(x)\\\\4(-2-i)+i(-2-i) \ \text{.... plug in x = -2-i}\\\\-8-4i-2i-i^2\\\\-8-6i-i^2\\\\-8-6i-(-1)\\\\-8-6i+1\\\\-7-6i\\\\`

Answer: -7-6i

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Problem 14

`(7-6i)(-8+3i)\\\\x(-8+3i) \ \text{.... let x = 7-6i}\\\\-8x+3xi\\\\-8(x)+3i(x)\\\\-8(7-6i)+3i(7-6i) \ \text{.... plug in x = 7-6i}\\\\-56+48i+21i-18i^2\\\\-56+69i-18(-1)\\\\-56+69i+18\\\\-38+69i\\\\`

Answer: -38+69i