Question

Ajutor dau coroana .
Calculați in R:
B)(x-2)^2 +(x+3)^2 =(x-3)^2 + (x+2)^2
C) x + 3x-9/5 =4- 5x-12/3

Answer 1

B) (x-2)^2+(x+3)^2=(x-3)^2+(x+2)^2
x^2-4x+4+x^2+6x+9=x^2-6x+9+(x+2)^2
-4x+4+x^2+6x=-6x+x^2+4x+4
-4x+6x=-6x+4x
2x=-2x
2x+2x=0
4x=0
x=0:4
x=0

C) x+3x-9/5=4-5x-12/3 {simplifici 3 si 12 cu 3}
4x-9/4=4-5x-4
4x-9/5=-5x
4x+5x=9/5
9x=9/5
x=9/45 {simplifici cu 9}
x=1/5


(x=0,2)