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3 years ago

5

Understand place value lesson 1.7

1 answer:

ella [17]3 years ago

3 0

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NEED HELP PLEASE!

USPshnik [31]

Answer:

$(x + (3+5i))^2 = x^2 + 6x + (10x+30)i - 16$

Step-by-step explanation:

Complex numbers identity:

The complex numbers identity is:

$i^2 = -1$

Square of the sum:

$(x + y)^2 = x^2 + 2xy + y^2$

In this question:

$(x + (3+5i))^2$

$x^2 + 2x(3+5i) + (3+5i)^2$

$x^2 + 6x + 10xi + 9 + 30i + 25i^2$

$x^2 + 6x + 9 + (10x+30)i - 25$

$x^2 + 6x + (10x+30)i - 16$

So

$(x + (3+5i))^2 = x^2 + 6x + (10x+30)i - 16$

5 0

3 years ago

A new club sent out 172 coupons to boost sales for next year's memberships. They provided 3 times as many to potential members

cricket20 [7]

Answer: 172: 4= 43

43× 3= 129

172-129= 43

Odp.Wysłali 43 kupony do istniejących członków.

Step-by-step explanation:1.bo wysłali 3×wiecej i jeszcze są istniejący członkowie

2.ile wyslali potencialnym

3.i ile wyslali do istniejacych

4 0

4 years ago

What is the area of a circle with a radius of 1 foot?

vladimir2022 [97]

Pi feet squared (I hope I helped!)

5 0

3 years ago

Read 2 more answers

1) The width of a rectangle is 6 meters less than its length. The area is 315 square meters. Find the length of the

Gre4nikov [31]

Answer:21

Step-by-step explanation:

x=length

x(x-6)=315

x^2-6x=315

x^2-6x-315=0

(x-21)(x+15)

x=21, x=-15

x cannot be negative so the only answer is 21

3 0

3 years ago

Solve. 3t < –15 (1 point)<br> t < –5<br> t > –5<br> t < –45<br> t > –45

Kipish [7]

I hope this helps you

3t÷3 < -15÷3

t < -5

8 0

4 years ago