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สมการกำลังสองและกราฟ

Total questions: 16

Worksheet time: 49mins

Name
Class
Date
1.
Does this parabola have a minimum or maximum and what is its value?
a)
minimum: 2
b)
maximum: 2
c)
minimum: 5
d)
maximum: 5
2.

What is the equation of the axis of symmetry?

a)

y = 0

b)

x = 0

c)

x = 3

d)

x = -3

3.

The average speed of a pick-up was 20km/h faster than the average speed of a lorry. The pick-up took 45 minutes less than the lorry to cover a distance of 180 km. Determine the speed of the lorry.

a)

75 km/h

b)

80 km/h

c)

60 km/h

d)

45 km/h

4.

Solve for x in (x4)2=(x8)(2x+7)\left(x-4\right)^2=\left(x-8\right)\left(2x+7\right)  

a)

8, -7

b)

-8, 9

c)

8, 7

d)

-8, -9

5.

John cycled 6 km from his home to school at an average speed of (2x - 3) km/h. Peter walked 2.4 km from his home to the school at an average speed of x km/h. Peter took 16 minutes less than John. Determine the time in minutes, that John took to reach the school.

a)

40 minutes

b)

6 minutes

c)

15 minutes

d)

45 minutes

6.

A rectangle whose area is 96m² is such that its length is 4metres longer than its width. Find it's perimeter.

a)

20 m

b)

12 m

c)

8 m

d)

40 m

7.

What are the roots of this quadratic function?

a)
x= 0 and x= -4
b)
x= 0 and x= 4
c)
y= 0
d)
x= 2
8.

The formula 'b2 - 4ac' is called the

a)
quadratic formula
b)
factored form
c)
vertex formula
d)
the discriminant
9.
The discriminant finds the
a)
number of solutions
b)
x-intercepts
c)
y-value of vertex
d)
y-intercept
10.

The sum of the squares of two consecutive odd numbers is 394. Find the numbers

a)

13 & 15

b)

13 & 17

c)

15 & 19

d)

14 & 15

11.

Find the values of k for which the following equation will have real and equal roots: 3x25x+2k=03x^2-5x+2k=0  

a)

k=2524k=\frac{25}{24}  

b)

k=2324k=\frac{23}{24}  

c)

k=524k=\frac{5}{24}  

d)

k=254k=\frac{25}{4}  

12.

Graph the following equation:

y=x2-2x-3

a)
b)
c)
d)
13.

Given this graph is the function of

y=x22x8y=x^2-2x-8 , what is the solution to x2=2x+8x^2=2x+8 ?

a)

(1, 9)

b)

x = {-2, 4}

c)

(0, 8)

d)

x = {5, 2}

14.

2x2=8x+32x^2=8x+3

 

2x28x3=02x^2-8x-3=0  

x=8±644(2)(3)4x=\frac{8\pm\sqrt{64-4\left(2\right)\left(-3\right)}}{4}  

x=8±404x=\frac{8\pm\sqrt{40}}{4}

x=8±2104x=\frac{8\pm2\sqrt{10}}{4}  

x=4±102x=\frac{4\pm\sqrt{10}}{2}  

Suzanne solved the equation using this process.

Did she make a mistake?

If yes, at which line did she make her first mistake?

(There are 5 steps in her process)

a)

Suzanne made no errors.

b)

Step 2

c)

Step 3

d)

Step 4

e)

Step 5

15.

What is/are the solution(s) to

3x21=743x^2-1=74  ?

a)

x = 5 only

b)

x = -5 only

c)

x = 5 and -5

d)

There are no real solutions

16.

Did you enjoy the quiz?

a)

Yes

b)

No