4x^2+4x+1=2x^2+7
2x^2+4x-6=0
D=b^2-4ac
D=16+48=64
x1=(-b+√D)/2a=(-4+8)/4=1
x2=(-b-√D)/2a=(-4-8)/4=-3
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4x^2+4x+1=2x^2+7
2x^2+4x-6=0
D=b^2-4ac
D=16+48=64
x1=(-b+√D)/2a=(-4+8)/4=1
x2=(-b-√D)/2a=(-4-8)/4=-3