How do signs change in an inequality?
Normal manipulation of inequalities does not affect the direction of the inequality such as:
addition
subtraction
multiplication or division by a positive number,
The direction of the inequality will change by:
multiplication or division of a negative number
swapping the sides of the inequality
This can also be thought of a sign change, where the sides are swapped back to their original sides, but the signs change.
OZ
Related Maths GCSE answers
All answers ▸Solve the equation: x^2+7x=-12
Factorise x 2 − x − 12
The equation of line L1 is y=5x-2. The equation of line L2 is 4y-20x=6. Show that these two lines are parallel.
A game consists of 5 cups turned upside down, under one of the cups is a prize. 5 friend's pick a cup in turn and lifts it up, if they get the prize, they win , but if not, the cup is removed and the next friend picks. What position is it best to pick?