What should be subtracted from x² – xy + y² to make it a perfect square?
xy
-xy
Both (xy) & (-xy)
None of these
Correct Answer: -xy
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Algebra MCQs
Algebra is the branch of mathematics that helps in the representation of problems or situations in the form of mathematical expressions. It involves variables like x, y, z, and mathematical operations like addition, subtraction, multiplication, and division to form a meaningful mathematical expression. All the branches of mathematics such as trigonometry, calculus, and coordinate geometry, involve the use of algebra.
If 0.5 x + 5 + 2 = x + 2 – 0.75, then the value of x is:
5.5
9.5
11.5
13.5
Correct Answer: 11.5
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The result of dividing the difference between two numbers by their sum is:
A. (n – m) / (n + m)
B. (n + m) / (n – m)
C. (n – m) – (n + m)
D. (n + m) – (n – m)
Correct Answer: A (n – m) / (n + m)
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The algebraic expression of the word expressing “subtract eight times of the number is from ten times of the number c is:
A. 10c – 8
B. 8c – 10
C. 10c + 8
D. 8 – 10c
Correct Answer: A (10c – 8)
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At present, the age of Aliya is x–10 years. What will be her age after 13 years where the value of x is 25 years?
A. 15 years
B. 20 years
C. 25 years
D. 28 years
Correct Answer: D (28 years)
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At present, the age of Asma is x–10 years. What will be her age after 15 years?
A. x + 5 years
B. x + 15 years
C. x + 10 years
D. x – 25 years
Correct Answer: A (x + 5 years)
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