Question

porfa ayudenme plisssssss

Answer 1

Respuesta:

1.

a + b = 7 ; ab = 10

(a + b)^2 = 7^2

a^2 + 2ab + b^2 = 49

a^2 + b^2 = 49 - 2(a.b)

a^2 + b^2 = 49 - 2(10)

a^2 + b^2 = 29

resp. a

2.

(x+1)^2 + (x-1)^2 -2x^2

${x}^{2} + 2x + 1 + {x}^{2} - 2x + 1 - 2 {x}^{2}$

$2 {x}^{2} - 2 {x}^{2} + 2x - 2x + 2$

$2$

Resp. b