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dybincka [34]
3 years ago
12

Which expression is correct for question 7

Mathematics
1 answer:
Neko [114]3 years ago
5 0
◆ COMPLEX NUMBERS ◆

given \: expression \: is \: - \\ \\ - 3 {i}^{4} + 2 {i}^{3} + 2 {i}^{2} + \sqrt{ - 9} \\ \\ we \: know \: that \: , \: \\ i = \sqrt{ - 1} \\ \\ {i}^{2} = - 1 \\ \\ {i}^{3 } = - i \\ \\ {i}^{4} = 1 \\ \\ \\ - 3 {i}^{4} + 2 {i}^{3} + 2 {i}^{2} + \sqrt{9} i \\ = - 3 {i}^{4} + 2 {i}^{3} + 2 {i}^{2} + 3i \\ \\ using \: the \: above \: properties \: of \: iota \: (i) \\ \\ = - 3(1) + 2( - i) + 2( - 1) + 3i \\ \\ = - 3 - 2i - 2 + 3i \\ \\ = (- 5 + i) \: \: \: ans.
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15 POINTS!!! How do the rules for adding and subtracting signed decimals compare with the rules for adding and subtracting integ
MArishka [77]

Answer:

The rules for adding and subtracting signed decimals are almost the same as the rules for adding and subtracting integers. When dealing with decimals, you need to be especially aware that your decimal points are lined up so that you do not accidentally add or subtract in the wrong place.

5 0
3 years ago
What is a possible integers for b? in the equation x squared+13x+36=(x+a)(x+b)​
Scorpion4ik [409]

Answer:

3) b = {4 , 9}

Step-by-step explanation:

x^2 + 13x + 36

36 = 9 * 6

13  = 9 + 4

so

x^2 + 13x + 36 = (x + 9)(x + 4) or = (x + 4) (x + 9)

possible b = {4 , 9}

6 0
3 years ago
Dos coches están separados por una distancia de 12000 m salen al encuentro uno del otro, el primero con una aceleración de 5,6 m
blagie [28]

Answer:

la respuesta es la primera ( a )

Step-by-step explanation:

4 0
3 years ago
Please look at image
Jet001 [13]
The value of x is 12
5 0
2 years ago
Can someone please explain expanded form with this number 15,409
Anarel [89]
The expanded form of 15,409 would be 15,000 + 400 + 9.

Your 15 would alone be 15,000. The 409 is turned into zeros.
For 409, take the 9 off of the end and keep it by itself, and then add a zero in replace for the 9, which makes 400. 
The 9 should come in at the last part as it is the last number.

Add them all together and you should get <span>15,000 + 400 + 9.</span>



3 0
3 years ago
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