Respostas
respondido por:
2
[(5x)²+2.5x.2+(2)²]-3[x²+2.4.x+(4)²]-3=
[25x²+20x+4]-3[x²+8x+16]-3=
[25x²+20x+4]-3x²+24x+48-3=
22x²+44x+49
[25x²+20x+4]-3[x²+8x+16]-3=
[25x²+20x+4]-3x²+24x+48-3=
22x²+44x+49
respondido por:
0
22x^2-4x-47
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