Question

55:26 The first step for deriving the quadratic formula from the quadratic equation, 0 = ax2 + bx + c, is shown. Step 1: –c = ax2 + bx Which best explains or justifies Step 1?

Answer 1

isolating the constant term.

Explanation:

`ax^2+bx+c =0`

if we subtract 'c' from both sides ,we get

`ax^2+bx+=-c`

which is actually isolating the constant term from terms with variables

this is how we can justify the first step for deriving quadratic formula.

Answer 2

Answer: This is to isolate the terms that contain the variable "x". Then, we can add both sides of the equation the number to complete the square of the right side of the equation