Ask question

Ask question

All categories

2 years ago

12

Evaluate the expression (3-2i)(3-2i) and write the result in the form a+bi ,where a is the real part of your answer and bis the

coefficient in front of the imaginary part

1 answer:

Maslowich2 years ago

4 0

Answer:

a = 5, b = -12

Step-by-step explanation:

By basic factoring, you get 9 - 12i + $4i^2$ . Since $i^2$ is simply -1, the expression evaluates to 9 - 12i - 4, which is 5 - 12i.

You might be interested in

Solve and graph the inequality on a number line : -19>g-24

Rom4ik [11]

Answer:

idk sry

Step-by-step explanation:

7 0

3 years ago

Kylie drank 35% ofna 400-mL contanier of water.Eugenia drank 45% of a 350 mL container of water.who drank more?Explain how you k

Andrei [34K]

Let Kylie's container (which is 400ml) be 100%. She drank 35%. Proportion:
400ml - 100%
x ml - 35%
So Kylie drank:
x=(400*35)/100=140 ml of water

Whole Eugenia's container (350ml) is also 100% and she drank 45%.
350ml - 100%
xml - 45%
Eugenia drank:
x=(350*45)/100=157,5ml of water

Thus, Eugenia drank (157,5-140)=17,5 ml more than Kylie

6 0

3 years ago

Which of the following rational functions is graphed below?

Mars2501 [29]

Answer:

Option B.

Step-by-step explanation:

We can see that we have an asymptote at x = 2

Remember that in a rational function, the asymptote is at the x-value such that the denominator is equal to zero.

So, the denominator is something like:

(x + a)

we have that the denominator is zero when x = 2

Then:

(2 + a) = 0

solving that for a, we get:

a = -2

Then the denominator of the rational function is:

(x - 2)

For the given options, the only one with this denominator is option B, then the correct option is B.

6 0

3 years ago

Which are equivalent expressions? Giving brainliest

MatroZZZ [7]

Answer:

7a. 7b=49ab

Step-by-step explanation:

5 0

2 years ago

If a rectangle has an area of 2x^2+7x+3 find the perimeter

Helen [10]

Answer:

Perimeter of the rectangle=6x+8 square units

Step-by-step explanation:

Given that area of rectangle is $2x^2+7x+3$

Area of rectangle=lw square units

$2x^2+7x+3=2x^2+x+6x+3$

$=x(2x+1)+3(2x+1)$

$=(x+3)(2x+1)$

$2x^2+7x+3=(x+3)(2x+1)$

Comparing the above equation with the given area we get

lw=(x+3)(2x+1)

Therefore length=x+3 and width=2x+1

To find the perimeter :

Perimeter of the rectangle=2(l+w) square units

$=2((x+3)+(2x+1))$

$=2(x+3+2x+1)$

$=2(3x+4)$

$=6x+8$

Therefore perimeter of the rectangle=6x+8 square units

6 0

3 years ago