In question 2, isn't is suppose to be +2 not -2 in quadratic formula? the b value? I think It's wrong. The b was -2 and you had to put it in -b place. b=-2 so, -b= +2. not -2

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Wait, in question 2, the b value is +2 in the quadratic formula. She did it correctly.

You are right. They had made a mistake. The formula calls for the opposite of b in the first number, but they had made -2 stay as -2 instead of 2 so their answer may b wrong, or they did it before but just had forgotten it. so the work was wrong, but the answer was right