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Worksheetsสมการกำลังสองและกราฟ
Total questions: 16
Worksheet time: 49mins
What is the equation of the axis of symmetry?
y = 0
x = 0
x = 3
x = -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.
75 km/h
80 km/h
60 km/h
45 km/h
Solve for x in (x−4)2=(x−8)(2x+7)
8, -7
-8, 9
8, 7
-8, -9
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.
40 minutes
6 minutes
15 minutes
45 minutes
A rectangle whose area is 96m² is such that its length is 4metres longer than its width. Find it's perimeter.
20 m
12 m
8 m
40 m
What are the roots of this quadratic function?
The formula 'b2 - 4ac' is called the
The sum of the squares of two consecutive odd numbers is 394. Find the numbers
13 & 15
13 & 17
15 & 19
14 & 15
Find the values of k for which the following equation will have real and equal roots: 3x2−5x+2k=0
k=2425
k=2423
k=245
k=425
Graph the following equation:
y=x2-2x-3
Given this graph is the function of
y=x2−2x−8 , what is the solution to x2=2x+8 ?
(1, 9)
x = {-2, 4}
(0, 8)
x = {5, 2}
2x2=8x+3
2x2−8x−3=0
x=48±64−4(2)(−3)
x=48±40
x=48±210
x=24±10
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)
Suzanne made no errors.
Step 2
Step 3
Step 4
Step 5
What is/are the solution(s) to
3x2−1=74 ?x = 5 only
x = -5 only
x = 5 and -5
There are no real solutions
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