Advanced MathVery hardConstant difference of two products
Advanced Math practice question
For all values of x, (x + 5)(x − 2) − (x + 1)(x + 2) is equal to which constant?
Answer: -12
(x² + 3x − 10) − (x² + 3x + 2) = −12.
Common wrong answers
- If you answered 0
- 0 assumes the products are equal.
- If you answered 12
- 12 has the sign wrong.
- If you answered -8
- −8 subtracts 2 from −10.
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