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(2x-3y)2 dar ultimul doi e la putere


Răspuns :

4x- 6y
Daca e la puterea 2
8x - 12 y .
aaa
(2x-3y) = 4x[tex] x^{2} [/tex] -2x2Xx3y + 3y[tex] ^{2} [/tex]
=(2x)^2+2*2x*3y+(3y)^2=4x^2+12xy+9y^2