Question

Carl is deriving the quadratic equation by completing the square. His work at one of the steps is shown. x + b/na = + or - b^2-4ac. Carl is not sure what the value of n is. What value should he use to continue deriving the quadratic equation correctly? A. 1 B. 2 C. 3 D. 4

Answer 1

Answer:

the correct option is B. 2

Step-by-step explanation:

As given,

x + $\frac{b}{na}$ = ± √b²-4ac

⇒x = -$\frac{b}{na}$ ± √b²-4ac

As e know that the quadratic formula is

x = $\frac{-b + or - \sqrt{b^{2} - 4ac } }{2a}$

So , by comparing with the formula

we get

n = 2

So, the correct option is B. 2