4х^2+16x-48=0 /4
x^2+4x-12=0
D=16+4*12=16+48=64=8^2
x1=( - 4+8)/2= 2
x2= (- 4 - 8)/2= - 6
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4х^2+16x-48=0 /4
x^2+4x-12=0
D=16+4*12=16+48=64=8^2
x1=( - 4+8)/2= 2
x2= (- 4 - 8)/2= - 6