Solve the equation: x^2 - 9x + 20 = 0

This is a quadratic equation, and is likely that x can satisfy either of two values. We know these must multiply to form 20 and summate to -9, and thus they are (x-4) and (x-5). Hence, x is either 4 or 5.

PM
Answered by Pippa M. Maths tutor

7031 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A light bulb is to be put in the middle of a room defined by the coordinates (10,5), (10,25), (20, 5) and (20,25). At what coordinate should the light bulb be placed?


solve two variables quadratic equation system 2x-y=1 10x^2-y^2-x+1=0


Evaluate 25^(3/2) giving your answer as an integer or simplified fraction (2 marks).


Solve the simultaneous equations 3x+2y=8 and 3y+4x=11


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