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Given d(x) = -2|x² - 3.6| for x = 5.5

User Cordula
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Explanation:

ok ? soooo .... ?

we need to put 5.5 in each place of x in the function expression and simply calculate.

you remember, the absolute value removes any negative sign of the value, but leaves the value unchanged in any other way.

d(x) for x = 5.5 means

d(5.5) = -2|5.5² - 3.6| = -2|30.25 - 3.6| = -2|26.65| =

= -2 × 26.65 = -53.3

the absolute value only handles everything that is inside its functional "borders", but nothing outside.

so, the -2 factor stayed -2, and the value inside the absolute value function was already positive anyway. so nothing changed there.

User Will Ward
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