Rozwiąż nierówność :
+6x-70
x²+6x-7≤0
Δ= 36- 4 razy 1 razy (-7)=36+28=64
√Δ=8
x1= (-6-8):2=-7
x2= (-6+8):2=1
x∈<-7,1>
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x²+6x-7≤0
Δ= 36- 4 razy 1 razy (-7)=36+28=64
√Δ=8
x1= (-6-8):2=-7
x2= (-6+8):2=1
x∈<-7,1>