59.1k views
1 vote
PLS ANSWER DIS MATH PROBLEM!!!

PLS ANSWER DIS MATH PROBLEM!!!-example-1
PLS ANSWER DIS MATH PROBLEM!!!-example-1
PLS ANSWER DIS MATH PROBLEM!!!-example-2

1 Answer

5 votes

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

=========================================================

Problem 9


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

Answer: 32 - 8i

=========================================================

Problem 10


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

Answer: 5

=========================================================

Problem 11


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

Answer: 10i

=========================================================

Problem 12


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

Answer: 20

=========================================================

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

=========================================================

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

User ARW
by
7.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories