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Mate1310
a fost răspuns

1) Calculati : a) (x+4)² b) (3x-1)² c) (2x+3)(2x-3)
2) Ordinea efect. op. (2x-5)² + 3(x-2)(x+2)-(x+4)²

Răspuns :

1) a) (x+4)la a 2a=x la a doua+2ori x ori 4+4 la a doua=x la a doua+8x+16
b)(3x-1)la a 2a=3x la a doua -2ori 3x ori-1+ (-1)la a doua=9x la a doua+6+1
c)(2x+3)(2x-3)=2x la a doua - 3 la a doua=4x la a doua -9

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