Open Middle®
Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create two separate quadratic equations.
Hint
What step would you take the square root in?
What numbers could you put there?
What numbers could you put there?
Answer
4x^2+3=7, x=±1 (x-5)^2=9, x=8,2
2x ^2+6x=8, x=+_1, (x-7)^2=4, x= 5,9
2x ^2+6x=8, x=+_1, (x-7)^2=4, x= 5,9
Source: Avanti Yamamoto