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ana308
@ana308
June 2023
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Розв'яжіть способом підстановки систему рівнянь через дискримінант
{у=-2х
{х²+у-3=0;
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Kormash
{у=-2х
{х²+у-3=0;
1. х²-2x-3=0
D= b^2-4ac = √ 4+12 = √ 16 = 4
х1 = -b^2-√D/2a = 2-4/2 = -1
х2 = -b^2+√D/2a = 2+4/2 =3
2. у=-2х
у1 = -2 • (-1) = 2
у2 = -2 • 3 = -6
Відповідь: (х1;у1) = ( -1;2 ). (х2;у2) = (3; -6)
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Answers & Comments
{у=-2х
{х²+у-3=0;
1. х²-2x-3=0
D= b^2-4ac = √ 4+12 = √ 16 = 4
х1 = -b^2-√D/2a = 2-4/2 = -1
х2 = -b^2+√D/2a = 2+4/2 =3
2. у=-2х
у1 = -2 • (-1) = 2
у2 = -2 • 3 = -6
Відповідь: (х1;у1) = ( -1;2 ). (х2;у2) = (3; -6)