The expression x2 - 2xy + y2 - x + y has one
factor which is
x - y = 1
x + y = 1
x - y - 1
x + y + 1
C.
x - y - 1
Under the topic, "Use of exponents to express
small numbers in standard form", the following facts are stated
A. the speed of light is 300000000 m/s.
B. the height of the Mount Everest is 8848m.
C. the diameter of a wire on a computer chip is 0.000003m.
D. the size of a plant cell is 0.00001275m.
The above examples are used to express each stated number in standard form. Use aof such examples
is made in class to grab the attention of students
more interested in Science
helps the teacher to identify the bright students
shows the accuracy aspect of numbers
reflects the inter-disciplinary approach
can reduce fractions to lowest term correctly and can write the units properly
has concept of units, conversion of units, fractions but missed the concept that ratio does not have units
always commits clerical error of writing unit with ratio
has clear concept of units and their conversion
A fraction is equivalent to . Its denominator 8 and numerator add upto 91. What is the difference between the denominator and numerator of this fraction ?
19
21
3
13
Salman solve - 3 - 4 = 7. The error is committed as
Salman needs to practice solving problems of similar type
Salman has not understood the concept of multiplication of integers
Salman is careless
Salman is not clear about the concept of addition of integer
If(x - 2) is a factor of x3 + ax2 + bx + 16 and b = 4a, then respective values of a and b are respectively
2, - 8
- 2, 8
- 2, - 8
2, 8