kayannahy
kayannahy
14-12-2017
Mathematics
contestada
Using Pascal’s triangle expand (q+3r)^2
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Аноним
Аноним
14-12-2017
The coefficients are 1 2 1
so the expansion is
q^2 + 2q(3r)(+ (3r)^2
= q^2 + 6qr + 9r^2
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