х¹= -7
х²= -3
Объяснение:
x+ 10x + 21=0
x+7x +3x +21=0
х(х+7) +3(x +7) = 0
(x +7)x(x +3) = 0
x +7= 0 x +3 = 0
X ¹= - 7
X²= - 3
х¹= -7
х²= -3
Объяснение:
x+ 10x + 21=0
x+7x +3x +21=0
х(х+7) +3(x +7) = 0
(x +7)x(x +3) = 0
x +7= 0 x +3 = 0
X ¹= - 7
X²= - 3