2х=10-3х, 2х+3х=10; 5х=10; х=10/5; х=2
х²+3х-10=0D=49x1=(-3+7)/2x1=2 x2=(-2-7)/2x2=-4.5 Ответ: х=-4.5; х=2
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2х=10-3х, 2х+3х=10; 5х=10; х=10/5; х=2
х²+3х-10=0D=49x1=(-3+7)/2x1=2 x2=(-2-7)/2x2=-4.5 Ответ: х=-4.5; х=2