Whenever you encounter a quantitative question with answer choices, be sure to SCAN the answer choices before performing any calculations. In many cases, the answer choices provide important clues regarding how to best solve the question.
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In step 3, (-4) x 2 shouldn´t
You are correct when you
You are correct when you write (-)(-)= +
In other words, (NEGATIVE)(NEGATIVE) = POSITIVE
However, in (-4) x 2, we have (NEGATIVE)(POSITIVE)
That is, -4 is negative and 2 is positive.
So, (-4) x 2 = -8