Question

What is the missing term?

(-14y^2 + 9y^2 -12y +3) + (2y^2 +? -6y -2) = (-3y^2 -15y +1)

Answer 1

3y

Explanation:

The missing term is 3y since the following like terms combine:

• 
  `-14y^2+9y^2+2y^2 = -3y^2`
• 
  `-12y+-6y = -18y`
• 
  `3+-2 = -1`

These terms are the same as the sum listed except -18y.

What must be added to -18y +____=-15y.

-18y+_3y__ =-15y

3y is the solution.