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(x-5)La patrat=49 Please ajutati-ma Repedeee


Răspuns :

(x-5)²=49
x²-10x+25=49
x²-10x+25-49=0
x²-10x-24=0
Δdelta=100-4 ori 1 ori (-24)
Δ=100+96
Δ=196
X1=(10+14)/2=24/2=12
X2=(10-24)/2=-14/2=-7