Question

Determine what to add to make the trinomial a perfect square. x2+8x+___

Answer 1

Answer: 16

Explanation:

For a perfect square each factor is identical.

Now, we have to find a number that adds to get 8.

The only option is (x+4)(x+4). When you distribute, you get x²+8x+16.

Now, we know that the missing number is 16.