Question

-4х^2+12х-9>0

Answer 1

-4х:2+12х-9=0

-10х=9

х = 9:(-10)

х=0,9

Answer 2

-4x^2+12x-9>0

f(x)=-4x^2+12x-9

f(x)>0,f(x)=0

-4x^2+12x-9=0

D=144-4*4*9=0

D=0,togda x=-12/-8=1.5

x ∈ ∅

funktzija ne vishe osi OX

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