Решите уравнение
1) х^2 + х = 0
2) 0,89х - х^2 = 0
3) 1,2х^2 - 0,3 = 0
4) 121 - 289х^2 = 0
1) х^2 + х = 0
2) 0,89х - х^2 = 0
3) 1,2х^2 - 0,3 = 0
4) 121 - 289х^2 = 0
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Решите уравнение1) х^2 + х = 0
x(x+1)=0 1) x=0 2) x+1=0 x=-1
2) 0,89х - х^2 = 0
x(0,89-x)=0 1)x=0 2) x=0,89
3) 1,2х^2 - 0,3 = 0
0,3(4x²-1)=0 (2x-1)(2x+1)=0 1)x=1/2 2) x=-1/2
4) 121 - 289х^2 = 0
(11²-17²x²)=0 (11-17x)(11+17x)=0 1)x=11/17 2)x=-11/17