MathRevolution wrote:
Let \(f(x)= (x-p)(x-q)\). If \(f(11)=f(20)=0\), then \(f(10)=\)?
A. -5
B. -1
C. 1
D. 5
E. 10
The product of two numbers is zero when either of/both the numbers is zero.
So we can assume: (p,q) : (11,20) in any order.
So f(10)= (10-11)(10-20)
answer 10.
_________________
Kindly drop a '+1 Kudos' if you find this post helpful.GMAT Math Book -I never wanted what I gave up
I never gave up what I wanted-