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dem82 [27]
2 years ago
14

What are the steps to find (2+2i)(5+3i)?

Mathematics
2 answers:
pshichka [43]2 years ago
7 0

Answer:

16i + 4

Step-by-step explanation:

(2 + 2i)(5 + 3i) =

= 2×5 + 2i×5 + 2×3i + 2i×3i

= 10 + 10i + 6i + 6i²

= 6i² + 16i + 10

= - 6 + 16i + 10

= 16i + 4

WITCHER [35]2 years ago
6 0

(2+2i)(5+3i)
10+6i+10i+6i^2
10+16i+6(-1)
4+16i
When you have an “i^2”, you also have a negative one. The simplified answer is 4+16i
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Jack and Julio each improved their yards by planting daylilies and geraniums. They bought their supplies from the same store.
o-na [289]

Cost of one daylily is $2 and cost of one geranium is $4.

Step-by-step explanation:

Let,

Cost of one daylily = x

Cost of one geranium = y

According to given statement;

x+5y=22    Eqn 1

13x+y=30    Eqn 2

From Eqn 1;

x=22 - 5y

Putting this value of x in Eqn 2;

13(22-5y)+y=30\\286-65y+y=30\\-64y=30-286\\-64y=-256

Dividing both sides by -64

\frac{-64y}{-64}=\frac{-256}{-64}\\y=4

Putting y=4 in Eqn 1

x+5(4)=22\\x+20=22\\x=22-20\\x=2

Cost of one daylily is $2 and cost of one geranium is $4.

Keywords: linear equation, substitution method

Learn more about substitution method at:

  • brainly.com/question/605571
  • brainly.com/question/5873564

#LearnwithBrainly

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3 years ago
Combine like terms to create an equivalent expression.
svetoff [14.1K]

Answer:

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Step-by-step explanation:

distribute the 2 to every term in ()

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now you have 2/5m -4/5 +3/5

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2/5m - 1/5

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