Question

[Quỳnh Ngô Như]

(x+3)^2+(4-x)(x+4)=1  tim x

Answer 1

[Nguyễn Lê Phước Thịnh]

=>x^2+6x+9+(4-x)(4+x)=1

=>x^2+6x+8+16-x^2=0

=>6x+24=0

=>x+4=0

=>x=-4

Answer 2

[Nguyễn Tuấn Dũng]

(x²+2.x3+3²) + (4- x) (4+ x)=1
x²+ 6x + 9 + 16 - x²=1
6x = 1 - 9 -16
6x = -24
x =-4