Question

What value of n in the expression below would make it a perfect square trinomial?

Answer 1

n = 49

Explanation:

We can find the value of n by completing the square. The general form of the quadratic equation is ax^2 + bx + c and the formula for completing the square is (b / 2)^2.

In the question, -14 is the b value so we can do:

`(-14/2)^2=(-7)^2=49`