The first step for deriving the quadratic formula from the quadratic equation, 0 = ax^2 + bx + c, is shown.
step 1: –c = ax^2 + bx
which best explains or justifies step 1?
1)subtraction property of equality
2)completing the square
3)factoring out the constant
3)zero property of multiplication

1) Subtraction property of equality

Step-by-step explanation:

Subtraction property of equality states that an equation does not change by subtracting a same number from both sides of the equation.

In completing the square method, we convert a quadratic function to a perfect square trinomial,

In factoring out the constant, we split the middle term (term having degree 1) of a quadratic equation by factoring the constant,

Zero property of multiplication states that if the product of two numbers is zero then either of the number or expression must be zero or both are zero.

Here, the given equation,

By subtraction property of equality,

Hence, OPTION 1) would be correct.

add an image

step-by-step explanation:

560

step-by-step explanation:

giggidy