Factorise x squared + 5x + 6.
Answer and explanation
Correct answer: D. (x + 2)(x + 3)
- Step 1: Find two numbers with product 6 and sum 5: they are 2 and 3. Step 2. Write the brackets as (x + 2)(x + 3). Answer: (x + 2)(x + 3). Why not the others: (x + 1)(x + 6) has a middle term of 7x; (x - 2)(x - 3) has -5x; (x + 5)(x + 1) has a constant of 5.
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