Question

Determine o valor de x.​

Answer 1

Resposta:

2.x.x+1=40

2x^2+2x=40

2x^2 +2x-40 =0

b^2-4.a.c

2^2-4.2.-40

4+320

324

-2+18/2.2

-2+18/4=16/4=4

-2-18/4=-20/4=-5

×=4