Question

In the derivation of the quadratic formula by completing the square, the equation

- 4ac + b 2
4a?
is created by forming a
perfect square trinomial.
What is the result of applying the square root property of equality to this equation?

Answer 1

B

Explanation:

Answer 2

2nd option is the correct answer.

Explanation:

`\because \bigg(x + (b)/(2a)\bigg) ^2 = (-4ac+b^2)/(4a^2)\\\\</p><p>\therefore \bigg(x + (b)/(2a)\bigg) ^2 = (b^2-4ac)/(4a^2)\\\\</p><p>\therefore \bigg(x + (b)/(2a)\bigg) = \pm \sqrt {(b^2-4ac)/(4a^2)} \\\\</p><p>\purple {\boxed {\bold {\therefore x + (b)/(2a)= (\pm√(b^2-4ac))/(2a)}}} \\\\`