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Ex4. Am nevoie urgent. Dau coroana ​

Ex4 Am Nevoie Urgent Dau Coroana class=

Răspuns :

M(x,y) punctul de intersectie

f(x)=g(x)

7x+21=-5x-3

7x+5x=-3-21

12x=-24

x=-2

f(-2)=7*(-2)+21=-14+21=7

g(-2)=-5*(-2)-3=10-3=7

=>y=7

=>M(-2,7)