Question

y=2x+1 y=x la Puterea a doua -x+3 Vă rog urgent!

Answer 1

y=2x+1

y=x^2-x+3

x^2-x+3=2x+1

scazi 2x

x^2-3x+3=1

scazi 1

x^2-3x+2=0

x^2-2x-x+2=0

x(x-2)-(x-2)=0

(x-1)(x-2)=0

ai 2 cazuri:

x-1=0

x=1

sau

x-2=0

x=2

deci ai 2 variante de y:

y=2 ori 1+1

y=3

sau

y=2 ori 2+1

y=5

solutille (x,y) sunt:{ (1,3) ; (2,5) }