How do you show some quadratic polynomials are always greater than 0?

Usually, there are two ways to solve this kind of problems. You could re-arrange the polynomial, make it become a square plus a constant, then the polynomial is greater or equal to the constant since a square of anything is greater or equal to 0.The second way is to use the formula. I would also encourage students to derive the formula themselves.

LW
Answered by Luke W. Maths tutor

5221 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Differentiate y=x^2cos(x)


Find the point of intersection of the lines y=2x-7 and 4y-2=3x


A curve C is defined by the parametric equations x=(4-e^(2-6t))/4 , y=e^(3t)/(3t), t doesnt = 0. Find the exact value of dy/dx at the point on C where t=2/3 .


Why does d/dx (tan(x)) = sec^2(x)?


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