Ответ:
x²+5x+14x+72=0
x²+19x+70=0
D=b²-4ac=361-280=81=9²
x1=(-19-9)÷2=-14
x2=(-19+9)÷2=5
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Ответ:
x²+5x+14x+72=0
x²+19x+70=0
D=b²-4ac=361-280=81=9²
x1=(-19-9)÷2=-14
x2=(-19+9)÷2=5