Question

m2+n2+p2-3mn-3np-3mp+6mnp,if m=1,n=-2 and p=3

Answer 1

SOL:

(1)2+(-2)2+(3)2-3(1)(-2)-3(-2)(3)-3(1)(3)+6(1)(-2)(3)

2-4+6+6+18-9-36 = 32 - 49 = -17

ANS IS -17