3 years ago

(4-5i)(-2+7i) what is the answer

Mathematics

2 answers:

Strike441 [17]3 years ago

8 0

Answer:

27 + 38 i

Explanation:

(4 - (5 * i)) * ((-2) + (7 * i)) =

Virty [35]3 years ago

6 0

Answer:

$- 35 {i}^{2} + 10i + 20$

Step-by-step explanation:

-8 + 28 + 10i - 35i^2

-35i^2 + 10i + 20

You might be interested in

What is the solution to the equation 3x+9-7x=2(x+6)

sladkih [1.3K]

The answer is x equals 1/2.

6 0

3 years ago

Read 2 more answers

I need an answer quick plzz

Montano1993 [528]

Drink the water so you have none left

4 0

3 years ago

The side lengths, in centimeters, of a triangle are 5x, 32, and 2(3x + 2). perimeter of the triangle is 80 centimeters. what is

Lerok [7]

Answer:

20 cm

Step-by-step explanation:

5x + 32 + 6x + 4 = 80

11x + 36 = 80

11x = 44

x = 4

sides of triangle:

5(4) = 20 cm

32 cm

6(4) + 2 = 26 cm

4 0

3 years ago

Round 18.2044986022 to the nearest hundred-thousandth.

postnew [5]

Answer:

The answer is 18.2.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

6 points

kodGreya [7K]

Answer:

$y=-2\,(x+3)^2-3$

Step-by-step explanation:

Notice that they are asking you to write the equation of the parabola in vertex form, that is using the coordinates of the vertex $(x_v,y_v)$ in the expression:

$y-y_v=a\,(x-x_v)^2\\y=a\,(x-x_v)^2+y_v$

we can start by directly replacing the given vertex coordinates (-3, -3) in the expression, and then using the extra info on the point the parabola goes through in order to find the parameter $a$ :

$y=a\,(x-x_v)^2+y_v\\y=a\,(x+3)^2+(-3)\\y=a\,(x+3)^2-3\\-5=a\,(-2+3)^2-3\\-5=a\,(1)-3\\a=-5+3\\a=-2$

So, now we can write the full expression for the parabola:

$y=a\,(x+3)^2-3\\y=-2\,(x+3)^2-3$

8 0

3 years ago