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:

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)