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Kryger [21]
3 years ago
14

Find the product of (x + 9i)^2 Find the product of (x+(3+5i))^2

Mathematics
1 answer:
Ket [755]3 years ago
3 0
Remember that
i =  \sqrt{1}
so
{i}^{2}  =  - 1  \:  \: and \:  \: {i}^{3} =  - i \:  \:  \: and  \:  \:  {i}^{4}  = 1
(a+ b)^2 = a^2 + 2ab + b^2

1. x^2 + 2x*9i + (9i)^2 = x^2 + 18xi - 81

2. x^2 + 2x*(3+5i)+ (3+5i)^2 = x^2 + 6x + 10xi+ 9+30i-25 = x^2 - 16 + 30i + 6x + 10xi
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Please answer ASAP will mark brainliest if correct
Mekhanik [1.2K]

Answer:

3, 5, 7

Step-by-step explanation:

As per triangle inequality theorem:

  • <em>Any side of a triangle must be shorter than the other two sides added together</em>

Assume the sides are equal to 3 smallest odd numbers: 1,3 and 5

  • Then 1+3< 5 and it is against the above rule, so this is not correct

The next triple is: 3, 5 and 7

  • Then 3+ 5 > 7 and it is correct

So 3, 5, 7 is the combination of smallest odd numbers to make sides of a triangle

4 0
3 years ago
The moon is about 240000 miles from earth.What is the distance written as a whole number multiplied by a power of ten
Sauron [17]
A whole number? ok. 24x10^4. usually though you would use standard form so it would be 2.4x10^5
5 0
3 years ago
Read 2 more answers
On a coordinate plane, 2 triangles are formed with a line with points (0, 2) and (x, y). A triangle has a rise of 1 and run of 2
DanielleElmas [232]

Answer: On a coordinate plane, 2 triangles are formed with a line with points (0, 2) and (x, y). A triangle has a rise of 1 and run of 2. Another triangle has a rise of 3 and run of 6.

Step-by-step explanation: Hope this helped if not just reply, I'll answer when I get a chance

7 0
2 years ago
A rock climber averages 12/35 feet per minute. Write and solve an equation to find how many feet x the rock climber climbs in 30
vazorg [7]

your equation would be 12/35x

12/35 times 30/1 = 360/35 = 10 10/35 = 10 2/7 feet


hope that helps

Brainliest is always appreciated : )

3 0
3 years ago
I need help with this percent problem ASAP
MrRissso [65]
He gave 75 CDs away and that was 6% of his collection.
⇒ 6% = 75

Find 1 %:
6% = 75
1% = 75 ÷ 6 = 12.5

Find 100% (100% being his full collection):
1% = 12.5
100% = 12.5 x 100 = 1250

Answer: He had 1250 CDs before he gave some away.

6 0
3 years ago
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