Algebraic expressions and formulas

Class 9 · Mathematics · 6 questions

Name: ____________________ Date: ____________

What is (a + b) squared?
- A 2a + 2b
- B a2 - 2ab + b2
- C a2 + 2ab + b2
- D a2 + b2
What is (a - b) squared?
- A a2 - ab + b2
- B a2 - 2ab + b2
- C a2 - b2
- D a2 + 2ab + b2
If a + b = 5 and ab = 6, what is a2 + b2?
- A 13
- B 37
- C 11
- D 25
What is the value of (101)2 using a formula?
- A 10001
- B 10101
- C 10201
- D 10200
The degree of the polynomial 3x^4 + 2x^2 + 1 is:
- A 1
- B 2
- C 4
- D 3
a2 - b2 is equal to:
- A a(a - b)
- B (a + b)2
- C (a + b)(a - b)
- D (a - b)2

Answer key

1. C, 2. B, 3. A, 4. C, 5. C, 6. C