book
Maths Puzzle
Numerical Ability
please help me with this problem {3a+b+c=7
a+3b-c=13
b=2a-1
Read Solution (Total 0)
book Other Question
Find and simplify P(a+h)-P(a) given P(x)=x^2-2x
If P=x+1/x-1 and Q=x-1/x+1, find P^2+Q^2-PQ.