Form and solve quadratics

Form an equation and solve:

  1. The product of two consecutive even numbers is 168. Find the numbers.
  2. A rectangle has length 3 cm more than its width. Area is 40 cm2. Find the width.
  3. The square of a number plus the number itself equals 30. Find the number.
  4. A father is 25 years older than his son. In 5 years, the product of their ages will be 600. Find their current ages.

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