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2 years ago

If f(x)=x^2 then evaluate (2+3i)

Mathematics

1 answer:

Virty [35]2 years ago

3 0

Answer:

-5 + 12 i

Step-by-step explanation:

(2 + 3i)^2 = 4 + 6i + 6i + 9i^2

= 4 + 12 i + 9(-1)

= - 5 + 12 i

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If q is the midpoint of segment PR, find the coordinates of R if P (11,-2) and Q (4,3)

Murrr4er [49]

Answer:

R(-3, 8)

Step-by-step explanation:

R = 2Q -P

R = 2(4, 3) -(11, -2) = (8-11, 6+2)

R = (-3, 8)

_____

You can derive the formula for the endpoint from the formula for the midpoint:

Q = (R + P)/2

R = 2Q - P . . . . . . multiply by 2 and subtract P

3 0

3 years ago

Five years from now, the sum of the ages of a women and her daughter will be 40 years. The difference in their present age is 24

Tomtit [17]

Answer:

Daughter age = 3 years

Step-by-step explanation:

Let x be the age of the women and y be the age of the daughter.

Given:

After five year the sum of the women and daughter age = 40

$(x+5)+(y+5)=40$

At present the sum of the women and daughter age

$x+5+y+5=40$

$x+y+10=40$

$x+y=40-10$

$x+y=30$ --------------(1)

So the sum of the present age is $x+y=30$

The difference in their present age is 24 years.

$x-y=24$

$x=24+y$

Now we substitute x value in equation 1.

$(24+y)+y=30$

$24+2y=30$

$2y=30-24$

$2y=6$

$y=\frac{6}{2}$

$y=3\ years$

Therefore, the daughter age is 3 years.

7 0

3 years ago

What is 6 more than 7 times a number is 41

son4ous [18]

the problem would be set up as 6+(7*x)=41

first u take off the number 6 by subtracting it from itself to cancel it out then u do the same to the number 41

7x =41 now u need to cancel out the number 7 attatched to the x so u divikde it by itself and then do the same to the other side so 41 divided by 7 =5.9

so x =5.9

8 0

3 years ago

This year a softball coach raise $1200 for new equipment that is 4% less then he raise last year how much did he raise last year

charle [14.2K]

1200*96%
$1200 \times 0.96$

8 0

3 years ago

Solve. x^2+ 5x-2=0<br> A. <br> B.<br> C.<br> D.

11Alexandr11 [23.1K]

the answer is........ B

4 0

3 years ago