Hello,

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9lx−6x^2+6
It not 91 it the letter L just lower case
Number 8 would be B. Number 9 would be A. Hope this helps! Mark brainliest? :))
Answer: Choice B) 
We have some value m and we're squaring it to get 
To undo this and isolate m, we apply the square root to both sides

There are two solutions here. This is similar to how there are two solutions in something like
(those two solutions being x = 5 and x = -5). Squaring any negative number leads to a positive result because
negative times negative = positive.