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
Answered by Oscar Z. Maths tutor

10302 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Expand and simplify (6x - 2y)(3x - 7y)


x - 2y = 1 , x^2 + y^2 = 13 find the solutions to this quadratic equation


Solve simultaneously x + y = 1, 2x + 3y =9


A shop trying to sell a laptop reduces its price by 7% at the very end of each week, from an initial price of £600. If you have £365 to spend, how many weeks must you wait until you can buy the laptop?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences