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devlian [24]
3 years ago
11

Please help and show work!

Mathematics
1 answer:
Lilit [14]3 years ago
3 0

Answer:

Step-by-step explanation:

The given quadratic must be rewritten in standard form before anything else is done:  -2x^2 + 8x - 8 = 0.  The coefficients of the x terms are {-2, 8, -8}.

The discriminant b^2 - 4ac is therefore (8)^2 - 4(-2)(-8), or  64 -  64, or 0.

A zero discriminant points to two real, equal solutions.

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Step-by-step explanation:

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{:}\longrightarrow\sf S_n={\dfrac {n}{2}}\left [2a-(a-1)d\right]

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