Quadratic or not

Exercise and reference answers

Upper category

YES

Lower category

NO

Items

1. Category

   YES

   Item

   x²+3x=0

2. Category

   NO

   Item

   x+5=0

3. Category

   YES

   Item

   2x²=18

4. Category

   NO

   Item

   x³=8

5. Category

   YES

   Item

   x²=49

6. Category

   NO

   Item

   3x-7=0

Instructions

Flip the points: is the equation quadratic?

Explanation