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PolarNik [594]
2 years ago
10

Simplify (3 + 2i)(7 − 5i).

Mathematics
2 answers:
erma4kov [3.2K]2 years ago
8 0
Rule needed: i^2 = -1
Standard form a + bi

(3 + 2i)(7 - 5i) FOIL
3 * 7 = 21
3 * - 5i = - 15i
2i * 7 = 14i
2i * -5i = - 10i^2 = - 10 * -1 = 10
Putting it all back together.
31 - i
swat322 years ago
3 0
(3+2i)(7-5i) = 21 - 15i + 14i + 10 = 31 - i
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if it takes anne 1/2 hour to read 2/3 of a chapter. About how long will it take her to read a chapter?​
kolbaska11 [484]

Answer:

45 minutes

Step-by-step explanation:

1/2 hour=30 minutes

2/3 of chapter=30 minutes

1/4 of hour=15 minutes

1/3 of chapter=15 minutes

3/4 of hour=45 minutes

3/3 of chapter=45 minutes

6 0
2 years ago
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Blababa [14]
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8 0
3 years ago
Simplifying an Expression with the Numerator and the Denominator Raised to a Power
slamgirl [31]

Answer:

The answer to your question is    the second option     \frac{1}{x^{48}y^{36}z^{6}}

Step-by-step explanation:

Expression

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Process

1.- Divide the fraction in numerator and denominator

a) Numerator  

 [(x²y³)⁻²]³ = (x⁻⁴y⁻⁶)³ = x⁻¹²y⁻¹⁸

b) Denominator

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2.- Simplify like terms

a) x⁻¹²x⁻³⁶ = x⁻⁴⁸

b) y⁻¹⁸y⁻¹⁸= y⁻³⁶

c) z⁻⁶

3.- Write the fraction

        \frac{1}{x^{48}y^{36}z^{6}}

6 0
3 years ago
Please help IM a NOT opErAted tO do THIs
stealth61 [152]

I have absolutely no idea goodluck with that

Now the reasoning of me not knowing is because my brain capacity is very low im just tryna get points I hope you find out the answer to that question good day sir

8 0
2 years ago
Read 2 more answers
If f(x) = 3 – x2, find f(-2).
Rufina [12.5K]

Answer:

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Step-by-step explanation:

To evaluate f(- 2) substitute x = - 2 into f(x) , that is

f(- 2) = 3 - (- 2)² = 3 - 4 = - 1

4 0
3 years ago
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