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3 years ago

X² -3x +2 = 0 by quadratic formula

Mathematics

1 answer:

AleksAgata [21]3 years ago

6 0

Answer:

x= 2,1

Step-by-step explanation:

If you're talking about solving it using the quadratic formula, then we're solving for x by finding a,b, and c of the quadratic equation. So we need to apply the quadratic formula which gives you x=2,1.

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A: What are the solutions to the quadratic equation x^2+9=0?

Nataliya [291]

Answer:

Part A)

x=-3i

x=3i

Part B)

(x+3i)(x-3i)

Step-by-step explanation:

Given:

Part A)

x^2+9=0

x^2=-9

x= √-9

x=√-1 *√9

x=± i *3

x=±3i

Part B)

x^2+9=0

x^2 - (-9)=0

x2-(3i)^2=0

(x-3i)(x+3i)=0 !

3 0

3 years ago

Math zoom join ends at 10:30 ID: 854 8913 6878<br> PASSCODE: 8yw2id hurry join be funny

Inessa05 [86]

no thanks but I'll see if I can get friends to join

8 0

3 years ago

Read 2 more answers

A concert hall has three sections: the main floor, the balcony, and the gallery. For a recent concert, 1020 tickets were sold. T

Angelina_Jolie [31]

Answer:

Let the number of balcony seats be b

Let the number of gallery tickets be g

Let the number of main floor tickets be m

b + g + m = 1020

b = 2g

m = b + 225

The number of balcony tickets = 318

The number of gallery tickets = 159

The number of main floor tickets = 543

Step-by-step explanation:

Let the number of balcony seats be b

Let the number of gallery tickets be g

Let the number of main floor tickets be m

i) Therefore we can write b + g + m = 1020

ii) there were twice as many balcony tickets sold as gallery tickets

therefore b = 2g $\Rightarrow$ g = 0.5b

iii) there were 225 more main floor tickets than balcony tickets

therefore m = b + 225

iv) using equation ii) and equation iii) in equation i) we can write

b + g + m = b + 0.5b + b + 225 = 1020 $\Rightarrow$ 2.5b = 795 $\Rightarrow$ b = 318

v) g = 0.5 b = 0.5 $\times$ 318 = 159

vi) m = b + 225 = 318 + 225 = 543

5 0

3 years ago

Read 2 more answers

at the county fair , 12% of the pepole who attended received free water bottels . if 1,500 people receive dfree water bottles ,

sweet-ann [11.9K]

12500 people went to fair

<h3><u>Solution:</u></h3>

Given that at the county fair , 12% of the people who attended received free water bottles

1,500 people received free water bottles

To find: number of peoples went to fair

Let "a" be the number of peoples went to fair

From given information,

12% of the people who attended received free water bottles and 1,500 people received free water bottles

Which means 12% of total people is equal to 1500

12% of total people = 1500

12 % of "a" = 1500

$\frac{12}{100} \times a = 1500\\\\a = 1500 \times \frac{100}{12}\\\\a = \frac{150000}{12} = 12500$

Thus 12500 people went to fair

3 0

2 years ago

Jillian wants to find the surface area of a pyramid. the base is a square with sides that are 4 inches long the other faces are

Natali5045456 [20]

Part a:-
The base of each triangle is 4 inches long.
Their height is 3/2 * 4 = 6 inches.

b
The combined area of the triangular faces = 4 * 1/2 * 4 * 6 = 48 sq ins

c
Surface area of the pyramid = 48 + area of base = 48 + 16 = 64 sq ins.

7 0

2 years ago