Napisz wyrażenia w najprostrzej postaci i oblicz ich wartość liczbową dla
m = -1
n = 2
5m (m+2n)+m(-5m-n)-2n(n-2) =
5m (m+2n)+m(-5m-n)-2n(n-2)= m=-1 , n=2
5m²+10mn-5m²-mn-2n²+4=
9mn-2n²+4=
9*(-1)*2-2*2²+4=
-9*2-2*4+4=
-18-8+4=
-22
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5m (m+2n)+m(-5m-n)-2n(n-2)= m=-1 , n=2
5m²+10mn-5m²-mn-2n²+4=
9mn-2n²+4=
9*(-1)*2-2*2²+4=
-9*2-2*4+4=
-18-8+4=
-22