A zero of an expression is a value of the input variable that results in the expression having a value of zero (catchy and appropriate name). Is x = 3 a zero of the quadratic expression shown below? Justify your
yes/no answer.
4x? - 8x-12

The zero of an expression is when the expression results to 0, for an input value.

is a zero of

Given that:

Substitute 3 for x

Simplify

When 3 is substituted for x, the quadratic expression have a value of 0

Hence, is a zero of the quadratic expression.

Read more about zero of expressions at:

total of apples - take away four

6-4 = 2

answer is 2 apples