Question

[lê thanh tùng]

bài 1 tìm x:a)(x+2)^3-(x+5)(x^2+x-3)

b)(x+1)^2=2(x+1)(x+2)+(x+2)^2=9

c)(x+2)^3-(x+5)(x^2+x-3)=5

d)(12x-5)(4x-1)+(3x-7)(1-16x)=81