Rozwiąż nierówność :
-x²+2x+24<0
a=-1
b=2
c=24
Δ=4-4*(-1)*24=100
x₁=6
x₂=-4
x∈(-∞,-4)u(6,+∞)
- x^2 + 2 x + 24 < 0
delta = b^2 - 4ac = 2^2 - 4*(-1)*24 = 4 + 96 = 100
p(delty) = 10
x1 = [ - 2 + 10]/(-2) = - 4
x2 = [ - 2 - 10]/(-2) = 6
a = - 1 < 0 - ramiona paraboli skierowane są ku dołowi, zatem
Odp. ( - oo; - 4 ) u ( 6 ; + oo )
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-x²+2x+24<0
a=-1
b=2
c=24
Δ=4-4*(-1)*24=100
x₁=6
x₂=-4
x∈(-∞,-4)u(6,+∞)
- x^2 + 2 x + 24 < 0
delta = b^2 - 4ac = 2^2 - 4*(-1)*24 = 4 + 96 = 100
p(delty) = 10
x1 = [ - 2 + 10]/(-2) = - 4
x2 = [ - 2 - 10]/(-2) = 6
a = - 1 < 0 - ramiona paraboli skierowane są ku dołowi, zatem
Odp. ( - oo; - 4 ) u ( 6 ; + oo )
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