What will be the sign of the result of the next exercise?
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What will be the sign of the result of the next exercise?
Remember the law:
For the sum of the angles of a triangle is always:
Negative
What will be the sign of the result of the next exercise?
\( (-2)\cdot(-4)= \)
Because you have one negative factor (-6) and one positive factor (5). The sign rule states: positive × negative = negative, so .
If both factors are negative, like , then the result would be positive! Remember: negative × negative = positive.
Easy memory trick:
Since (-6) and (+5) have different signs, the answer is negative!
Either way works! You can multiply the magnitudes: 6 × 5 = 30, then apply the sign rule to get -30. Or determine the sign first (negative), then multiply.
Magnitude means the absolute value or size of a number without its sign. So the magnitude of -6 is 6, and the magnitude of 5 is 5.
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