Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 3 | A Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Help asap ty
Date Posted: 1 year ago
Views: 175
See 1 Answer
x²+(1-p)x-p
b²-4ac >= 0 for real roots (if question didnt specify whether equal or distinct)
(1-p)²-4(1)(-p) >=0
1-2p+p² +4p >=0
p²+2p+1 >=0
complete the square from here
(p+2/2)²-(2/2)²+1 >=0
(p+1)² >=0
Since (p+1)² >= 0, the equation has real roots for all values of p.
b²-4ac >= 0 for real roots (if question didnt specify whether equal or distinct)
(1-p)²-4(1)(-p) >=0
1-2p+p² +4p >=0
p²+2p+1 >=0
complete the square from here
(p+2/2)²-(2/2)²+1 >=0
(p+1)² >=0
Since (p+1)² >= 0, the equation has real roots for all values of p.
360 Tutoring Program