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cum rezolv exercitiu asta? 6x-20x+16 9x la puterea2-16
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4 la puterea2-16x+16 2x la puterea2+ 2x -12


Răspuns :

6x-20x+144x^2-16=16-16x+32x^2+2x+12 <=>144x^2+32x^2+ 6x-20x+16x+2x = 12+16 <=> 176x^2 -4x=28 <=> 176x^2-4x-28=0|:4 <=> 44x^2-x-7=0