Question

(x² - y² = 8
(x + y = 4

Answer 1

Resposta:

usando √2 = 1,4

y = 0,5875 x=3,4125

y = 0,4125 x=3,5875

Explicação passo-a-passo:

x=4-y

(4-y)²-y²=8

4²-2x4xy + y² +y² =8

16-8y+2y²=8

16-8y+2y²-8=0

8-8y+2y²=0

bhaskara

a: 8

b: -8

c: 2

∆= -8²-4x8x2

∆= 64 - 62

∆= 2

8+-√2/2x8

x¹= 8+1,4/16

x¹= 9,4/16

x¹=4,7/8

x¹= 0,5875

x²= 8-1,4/16

x²= 6,6/16

x²= 3,3/8

x²= 0,4125

x¹

x+0,5875=4

x=4-0,5875

x= 3,4125

x²

x+0,4125=4

x=4-0,4125

x=3,5875