What will be the result of this algebraic expression:
if we place
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What will be the result of this algebraic expression:
if we place
The first step is to substitute X in the exercise, resulting in:
When we have two numbers with different signs, meaning one number is negative and the other is positive or vice versa,
the result of multiplication or division will always be negative.
What will be the result of this algebraic expression:
\( 5x-6 \)
if we place
\( x=8 \)
Parentheses make it crystal clear that you're multiplying 5 by the entire value -3. Without them, 5 × -3 might be misread as 5 - 3, leading to wrong answers!
When multiplying numbers with different signs (one positive, one negative), the result is always negative. So .
In -15 - 6, you're subtracting 6 from -15, which moves further left on the number line to -21. In -15 + 6, you'd move right to get -9.
That would be if you calculated instead of . Remember: multiplication comes before addition/subtraction in order of operations!
Substitute back into the original expression: . Since this matches our answer, we know -21 is correct!
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