Question

What is the value of `x^2 - 9x - 6` when `x=0`? What about when `x = -1`?

Answer 1

See explanation

Explanation:

Given:`" "y=x^2-9x-6`

Substitution of `color(blue)(x=0)` Gives:

`color(brown)( y=(color(blue)(0))^2-9(color(blue)(0))-6 )color(green)(" "->" "y= 0+0-6)" "->" "y=-6`

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Substitution of `color(blue)(x=(-1))` Gives:

`color(brown)(y=(color(blue)(-1))^2-9(color(blue)(-1))-6)" "color(green)(->" "y=1+9-6)" "->" "y=4`