Question

In the quadratic equation x2 - 8x + a = 0; what is the value, a, in order to form a perfect square?

Answer 1

Answer:

16

Step-by-step explanation:

(x - y)² = x² - 2xy + y²

x = x and y = a

2xy = 8x

2*x*a = 8x

     a = $\frac{8x}{2x}$

a = 4

a²  = 16