Question

Dau coroana si 28 de puncte.
Materie clasa a 10 a.
Multumesc anticipat.​

Answer 1

Răspuns:

Explicație pas cu pas:

ecuatia dreptei

y = ax + b

___________

A(-5, 3); B(1, -5)

y = ax + b

3 = -5a + b

-5 = a + b

b = 3 + 5a

-5 = a + 3 + 5a

6a = -5 - 3 = -8

a = -8/6 = -4/3

b = -5 - a = -5 + 4/3 = -15/3 + 4/3 = -11/3

ecuatia dreptei y = -4x/3 - 11/3

_____________

A(2, 3); B(-1, 3)

y = ax + b

3 = 2a + b

3 = -a + b

b = 3 + a

3 = 2a + 3 + a

3a = 0

a = 0

b = 3

ecuatia dreptei y = 3

____________________

A(0,5); B(-3, 0)

y = ax + b

5 = a*0 + b

0 = -3a + b

b = 5

3a = b

3a = 5

a = 5/3

ecuatia dreptei y = 5x/3 + 5