Question

n*(-n^2+9n-14)=0. Sa se rezolve ecuatia.

Answer 1

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Answer 2

n(-n^2+9n-14)=0
vom avea trei soluții pt necunoscuta n
n1=0
-n^2+9n-14=0
a=-1
b=9
c=-14
∆=81-56
∆=25
n2=(-9-5)/-2
n2=7
n3=(-9+5)/-2
n3=2
sau
n(-n^2+9n-14)=0
n(-n^2+2n+7n-14)=0
n[n(2-n)-7(2-n)]=0
n(n-7)(2-n)=0
n1=0
n2=7
n3=2