Factorising expressions

Factorising expressions Quiz

IB MYP Maths Standard: Quiz

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5 questions, one answer each

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1. Factorise fully $8x^2-12x$ .
- A. $2x(4x-6)$
- B. $x(8x-12)$
- C. $4x(2x-3)$
- D. $4(2x^2-3x)$
2. Factorise $x^2-81$ .
- A. $(x-9)(x+9)$
- B. $(x-9)^2$
- C. $(x+9)^2$
- D. $(x-81)(x+1)$
3. Factorise $x^2-2x-15$ .
- A. $(x-5)(x-3)$
- B. $(x+5)(x-3)$
- C. $(x+15)(x-1)$
- D. $(x-5)(x+3)$
4. Solve $x^2+x-6=0$ .
- A. $x=3$ or $x=-2$
- B. $x=-3$ or $x=2$
- C. $x=-6$ or $x=1$
- D. $x=6$ or $x=-1$
5. Simplify $\frac{x^2-16}{x+4}$ .
- A. $x+4$
- B. $x^2-4$
- C. $x-4$
- D. $x-16$