3 years ago

Which pair of complex factors results in a real number product? 15(–15i) 3i(1 – 3i) (8 + 20i)(–8 – 20i) (4 + 7i)(4 – 7i)

Mathematics

2 answers:

photoshop1234 [79]3 years ago

6 0

Answer:

(4 + 7i)(4 – 7i)

Step-by-step explanation:

This pair will produce a real answer because they are complex conjugates.

Complex conjugates ( a+bi) (a-bi) when multiplied together form a real number ( a^2 + b^2)

I am Lyosha [343]3 years ago

6 0

Answer:

D. (4+7i)(4-7i)

Step-by-step explanation:

You might be interested in

Wayne purchased 15 pounds of bird seed for $36.75 at Hank's

Sonbull [250]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Range of f(x) = x2 + 1?

SSSSS [86.1K]

Step-by-step explanation:

-1<x<infinity this is answer I guess

7 0

3 years ago

2x+20=-3x-25 help me solve it

zysi [14]

The correct answer is x= -9. Hope this helps!!

8 0

3 years ago

Read 2 more answers

What is 5m2- 15m- 200

vitfil [10]

Answer:

5(m + 5) (m - 8)

Step-by-step explanation:

5m2- 15m- 200

Start by pulling 5 out.

5(m^2 - 3m - 40)

We consider all factors of 40

1 40

2 20

4 10

5 8

Based on the middle term we know that 5 and 8 are our best option.

5(m 5) (m 8)

We know the signs have to be one + and one - because a - * - = + and + * + = +

Since 5 - 8 would give us -3 we know that our answer is

5(m + 5) (m - 8)

3 0

3 years ago

Decide whether ▱ABCD with vertices A(−2,3), B(2,3), C(2,−1), and D(−2,−1) is a rectangle, a rhombus, or a square. Select all nam

ozzi

Answer:

D and B

Step-by-step explanation:

3 0

4 years ago