Question

HELP ME PLEASE!! Describe how you can use the factors of a quadratic function to find its zeros.

Answer 1

Answer:

Factorising the equation into brackets can help you identify where the x-intercepts are (where the function cuts the x-axis)

Step-by-step explanation:

When you factorise the equation it would look something like this:

(x + a)(x + b) = 0

This also means:

x + a = 0        and        x + b = 0

x = -a             and        x = -b

Example:

Find where the function y = 2x² + 8x + 6 cuts the x-axis

Factorise the 2 out (highest common factor)

x² + 4x + 3 = 0

(x + 1)(x + 3) = 0

x = -1 or -3