Question

Given m= -2 and n=6, evaluate (i) m+n (ii) 2m^2+8n (iii) m^2-n^2 (iv) 3m^3+2m^2n+n^3

Answer 1

(i) m+n
=-2+6
=4
(ii)2(-2)^2+8(6)
=8+48
=56
(iii)(-2)^2-(6)^2
=4-12
=-8