數學,,唔明,,有誰能進來幫幫我,,

這是二項式定理,,
in the expansion of (1+px)(1+qx)^5,where p≠0 and q≠0,the coefficients of x and x^2 are -6 and 0 respectively.find the values of p and q.
ans:
p=4 q=-2
有誰能幫我計計這條,,並告訴我步驟？..
唔該幫幫我啦..