Why is there more than one solution to x^2 = 4?

Think about it as 'What numbers can be x to get 4'. Remember that when you square a number the answer is always positive? Here is a situation in which it's important to consider both of the possible solutions.For this question x = 2 or x=-2.This is because when you square both sides they both become positive which makes them both solutions to to this problem.

Answered by Benjamin T. Maths tutor

3008 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Given the two curves y1 and y2, verify the two curves intersect at (-5,0) and (2,0)


Why is (x^3 - 7x^2 +13x - 6) divisible with (x-2)?


How can you tell if a function is even or odd?


The line AB has equation 5x + 3y + 3 = 0. The line AB is parallel to the line y = mx + 7. Find the value of m.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences