SAT Math Practice Exam

Category - Mathematics - Medium

Which of the following expressions is NOT equivalent to (a + b)(x+y) ?
  1. (a + b)x + (a + b)y
  2. a(x + y) + b(x+y)
  3. (b + a)(y + x)
  4. ax + by
  5. ax + bx + ay + by
Explanation
Answer: D - ax + by
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