Question

ajutati-ma va rog sa rezolv in R ecuatia:
x(x+2)-(x-3)(x+3)=13

Answer 1

x(x+2)-(x-3)(x+3)=13
x²+2x-x²+9-13=0
2x-4+0
x=4/2=2

Answer 2

x la puterea a doua +2x-(x la adoua - 3la a doua)=13
ײ+2x-ײ+3²=13
+x² cu -x² se simplifica si  ne da o 
2x+9=13
2x=13-9
2x=4
x =4 :2
x=2