Find a tutor
How it works
Prices
Resources
For schools
Become a tutor
Answers
>
Maths
>
GCSE
>
Article
Given the function f(x) = 2x^(2) + 3, find the value of x when f(x) = 53.
Substitute f(x) = 53 into the equation given:f(x) = 53 = 2x
2
+ 32).
2. Rearrange to get x
2
on the left hand side: x
2
= (53-3)/2 = 253).
3. Square root both sides.
Remember, the answer can be positive or negative:x = +5 or -5
EB
Answered by
Emily B.
•
Maths tutor
4809 Views
See similar Maths GCSE tutors
Related Maths GCSE answers
All answers ▸
ABC is a triangle with sides of length AB, 12m and BC,14m. Angle ACB = 43 degrees. Find the area of the triangle.
The area of a rectangle is 8cm^2. The rectangle is (3x+1) by (2x+5). Find the value of x
f(x)=2x+c, g(x) = cx+5, fg(x)= 6x+d, work out the value of d
Solve x^2-5*x+6=0
We're here to help
Contact us
Message us on Whatsapp
+44 (0) 203 773 6020
Company Information
Careers
Blog
Subject answers
Become a tutor
Schools
Safeguarding policy
FAQs
Using the Online Lesson Space
Testimonials & press
Sitemap
Popular Requests
Maths tutor
Chemistry tutor
Physics tutor
Biology tutor
English tutor
GCSE tutors
A level tutors
IB tutors
Physics & Maths tutors
Chemistry & Maths tutors
GCSE Maths tutors
© MyTutorWeb Ltd 2013–2025
Terms & Conditions
|
Privacy Policy
CLICK CEOP
Internet Safety
Payment Security
Cyber
Essentials
Cookie Preferences