Question

1. (x+1)(x+2)=2
2. (x-3)(x+4) + x =-5
3. ( x²-9) + x + 3 =0
Va rog ajutati-ma!!!

Answer 1

1. (x+1)(x+2)=2
x2+x+2x+2=2
x2+3x=0
x(x+3)=0
x=0sau x=-3

2. (x-3)(x+4) + x =-5
x2+4x-3x-12+x=-5
x2+2x-7=0
cu delta=32
x= -1+2rad2  sau
x= -1-2rad2
 
3. ( x²-9) + x + 3 =0
x2+x-6=0
delta=25
x=2 sau x=-3