Algebraic expressions and substitution

Algebraic expressions and substitution Quiz

IB MYP Maths Standard: Quiz

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5 questions, one answer each

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1. What is the value of $3x^2$ when $x=-2$ ?
- A. $-12$
- B. $36$
- C. $-36$
- D. $12$
2. Simplify $4a+3b-a+5b$ .
- A. $3a+8b$
- B. $5a+8b$
- C. $3a+2b$
- D. $11ab$
3. Expand $-3(x-4)$ .
- A. $-3x-12$
- B. $-3x+12$
- C. $3x-12$
- D. $-3x-4$
4. Expand and simplify $(x+2)(x+7)$ .
- A. $x^2+14$
- B. $x^2+5x+14$
- C. $x^2+9x+14$
- D. $x^2+9x+9$
5. Expand $(x-5)^2$ .
- A. $x^2-25$
- B. $x^2-10x+25$
- C. $x^2+25$
- D. $x^2-10x-25$