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Determinati x stiind ca 0,125=0,025x(x+4)

Răspuns :

0,125=0,025x patrat+0,1
-0.025x patrat=0.1 - 0.125
-0.025x patrat=-0.025 / : (-0.025)
x patrat= 1
x= radical din1
0,125= 0,025 x ( x+ 4) / : 0.025
5 = x + 4 / -4
x  = 1