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
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Answered by
18
M+n=-2+6=4
2m^2+8n=2(-2)^2+8×6=2×4+48=8+48=56
m^2-n^2=-2^2-6^2=4-36=-32
2m^2+8n=2(-2)^2+8×6=2×4+48=8+48=56
m^2-n^2=-2^2-6^2=4-36=-32
Answered by
9
2m^2+8n=2(-2)^2+8×6=2×4+48=8+48=56
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