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How can you tell if a parabola moves up or down in an equation?
Look at the discriminant, B2 - 4AC, in the quadratic equation. As it goes from negative to positive, the parabola moves in the direction of its small end towards the X-axis. At zero, it touches the X-axis.
What are the rules of multiplying negatives and positives?
positive X positive = positive positive X negative = negative negative X positive = negative negative X negative = positive
When multiplying a negative number by a positive number is the result going to be negative or positive?
The result will always be negative. Positive X Positive = Positive Negative X Negative = Positive Positive X Negative = Negative
What are the rules for multiplying integers?
Positive x Positive =Positive Positive x Negative= Negative Negative x Positive= Negative Negative x Negative =Positive
What number must you add to the following statement to make it true 9 plus x equals 0?
If this is the equation you presented: 9+x=0 then x would have to equal (-9). This is because the negative 9 and the positive 9 cancel out to equal zero. -Owlsrule96
