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Vlad [161]
3 years ago
6

Simplify the expression (8+i)(2+7i)

Mathematics
1 answer:
Rus_ich [418]3 years ago
4 0

Given : (8 + i)(2 + 7i)

⇒ (8 × 2) + (8 × 7i) + (i × 2) + (i × 7i)

⇒ 16 + 56i + 2i + 7i²

We know that i² = -1

⇒ 16 + 58i + 7(-1)

⇒ 16 + 58i - 7

⇒ 9 + 58i

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3x^2+48=0, solve the equation
MAXImum [283]

Answer:

16 + x2 = 0     (16)

I THINK

Step-by-step explanation: Simplifying

3x2 + 48 = 0

Reorder the terms:

48 + 3x2 = 0

Solving

48 + 3x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-48' to each side of the equation.

48 + -48 + 3x2 = 0 + -48

Combine like terms: 48 + -48 = 0

0 + 3x2 = 0 + -48

3x2 = 0 + -48

Combine like terms: 0 + -48 = -48

3x2 = -48

Divide each side by '3'.

x2 = -16

Simplifying

x2 = -16

Reorder the terms:

16 + x2 = -16 + 16

Combine like terms: -16 + 16 = 0

16 + x2 = 0

The solution to this equation could not be determined.

8 0
3 years ago
Which expression is equivalent to 6/7 divided by 3/5 ?
Harman [31]

Answer:

A.

Step-by-step explanation:

6/7  / 3/5   we invert the divisor and multiply:

= 6/7 * 5/3

8 0
3 years ago
Priya buys 2 pounds of turkey for 10.60
AfilCa [17]

Answer: If you were to divide it by 1 pound of turkey it would be 5.30 but there is no finished question

Step-by-step explanation:

7 0
2 years ago
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Answer the following question and will mark Brainliest
spin [16.1K]

a) f(4) = 3*4 - 4

          = 8

b) h(-3) = 5 - ( - 3)

             = 5 + 3 = 8

c) h(4) - f(-5) = 1 + ( -19)

                     = -18

have a nice day <3

7 0
3 years ago
What fractional part of one gallon would fit in one quart
babymother [125]
<span>1/4 1 gallon = 4 quarts 1 quart = 0.25 <span>gallon
I hope this helped!
</span></span>
4 0
3 years ago
Read 2 more answers
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