1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
castortr0y [4]
3 years ago
15

Multiply and express your answer in standard form (-2+7i)(3+4i)

Mathematics
1 answer:
Gnom [1K]3 years ago
8 0

Answer:

-34 + 13i

Step-by-step explanation:

to solve (-2 + 7i)(3+4i), we can use FOIL which is:

First

Outside

Inside

Last

lets start off with F, we multiply the first 2 terms of each expression

(-2 + 7i)(3+4i)

this gives us -6

next is O, we multiply the 2 outside times of the expression:

(-2 + 7i)(3+4i)

this gives us -8i

I is the next step, we multiply the 2 terms on the inside:

(-2 + 7i)(3+4i)

this gives us 21i

the last step is the letter L in which we multiply the last terms of each expression:

(-2 + 7i)(3+4i)

this gives us -28, and the reason for that is because if we multiply 7i × 4i gives us 28i². i² is equal to -1, so we multiply 28 by -1 which gives us -28

so this gives us the new expression:

-6 -8i + 21i - 28

we now combine like terms which gives us the expression

-34 + 13i

this cannot be simplified any further, so this is our answer in standard form

You might be interested in
At Silver Gym, membership is $20 per month, and personal training sessions are $35 each. At Fit Factor, membership is $40 per mo
Molodets [167]

Answer:

125

Step-by-step explanation:

5 0
2 years ago
Lace edging is sold by the foot for $0.80 or by the foot for $1.99. Which is more expensive
vampirchik [111]

Answer:

$1.99 is more expensive.

Step-by-step explanation:

Given:

One type of lace edging cost $0.80 per foot

Another type of lace edging cost $1`.99 per foot.

We need to find which is more expensive.

In $0.88 where one's place is 0.

In $1.99 where one's place is 1.

By comparing the one's place obviously $1.99 more expensive.

Hope you will understand the concept.

Thank you.

6 0
3 years ago
Help please !!!!!!!!!!!!
Anastasy [175]

Answer:

X=10 and

y = 5 \sqrt{3}

4 0
2 years ago
What is the area of sector ACB? Leave your answer in terms of pi.​
andre [41]

Answer:

c

Step-by-step explanation:

7 0
2 years ago
Your new job is at the Custom T Shop,
kolbaska11 [484]
415

8*50 + 15


Mark brainliest please
3 0
2 years ago
Other questions:
  • The fastest a human has ever run is 27 miles per hour how many miles per minute did the human run
    9·1 answer
  • Does anyone know what x is - 3/4 (x+2)=6
    13·2 answers
  • Lesson 2: Multiplying and Dividing Rational Expressions
    7·1 answer
  • An academic adviser wanted to investigate the amount of money spent by students on textbooks. She randomly sampled 25 students a
    15·1 answer
  • Find a formula for the nth term an=4n+?
    5·1 answer
  • 846 x (84) what is it?
    6·2 answers
  • ℎ ... ! <br> <br> REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
    6·1 answer
  • What is the correct value of 3x + 2 for x = 5?
    9·2 answers
  • Can anyone help me?​
    6·1 answer
  • I will give brainliest to right answer
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!