# Solve the following by using the quadratic formula?

##### 1 Answer

Jul 19, 2016

x =-1 and

#### Explanation:

y = (a + b)x^2 + (a + 2b + c)x + (b + c) = 0

y is in the quadratic form:

y = Ax^2 + Bx + C = 0, with

A = a + b

- B = - a - 2b - c

C = b + c

Since A - B + C = 0, use shortcut:

The 2 real roots of y are: x = - 1 and