3 years ago

How do you solve this?(5+i)(5+2i)

Mathematics

1 answer:

kozerog [31]3 years ago

7 0

Answer:

23 +15i

Step-by-step explanation:

Multiply the binomials in the usual way, then replace i² by -1 and simplify.

(5 +i)(5 +2i) = (5)(5) +(5)(2i) +(i)(5) +(i)(2i) = 25 +10i +5i +2i²

= 25 +15i +2(-1)

= 23 +15i

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-2 1/8 divided by 1 1/4

attashe74 [19]

Answer:

$-1\frac{7}{10}$

Step-by-step explanation:

Convert the mixed numbers into improper fractions: $\frac{-17}{8}$ ÷ $\frac{5}{4}$
Apply the fractions formula for division: $\frac{-17*4}{8*5} = \frac{-68}{40}$
Simplify: $-1\frac{7}{10}$

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4 years ago

Express 3 to the powermof -2 as rational number

faltersainse [42]

Answer:

(2/3)³

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Step-by-step explanation:

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3 years ago

Write an expression in factored form for the polynomial of least possible degree graphed below.

dexar [7]

Answer:

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Step-by-step explanation:

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3 years ago

HELP

kati45 [8]

Slope: 1/5

Y-intercept: 0

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3 years ago

Please help me on this <br><br> Simplify (12^2)^4

nika2105 [10]

(12^2)^4

= 12^(2*4)

= 12^8 (or 429,981,696)

7 0

4 years ago