x+y=224x+2y=74então calcule o valor de x2+y=?.... Pergunta de ideia deMestretonel

Mestretonel @Mestretonel

April 2020 1 17 Report

x+y=22

4x+2y=74

então calcule o valor de x2+y=?

Lista de comentários

poty

Verified answer

{x+y=22 ----> x = 22-y ------(I)
{4x+2y=74 --> 4x = 74 -2y --> x = $\frac{74-2y}{4}$ ---(II)

(I) =(II)
22-y = $\frac{74-2y}{4}$ ---mmc=4
88 - 4y = 74 - 2y
14 = 2y ---> y = 7

(I) x = 22 - y ---> x = 22 - 7 ---> x = 15

calcule o valor de x²+y= 15² + 7 = 225 + 7 = 232

2 votes Thanks 1

Lista de comentários

Verified answer

F(x) = 5x - 8 .... qual o valor de f(2)?

2x-y=2 e x+3y=15qual o valor de x2 + y2=

(a2-b2)= seria (a+b).(a-b) ?

(3x - 2) / (4x+4) = 1/2qto vale X

Recomendar perguntas

Helpful Links

Helpful Social