2(X+4)(X+6)+ 2(X+1)(X+12)(X+6)(X+8)+ 2(X+10)(X+12)=10(X+8)(X+10)+ 2(X+2)(X+4)+ 2

câu 19: - DE THI HK1
Toán DE THI HK1
Câu 19: Chứng minh rằng:2(x+4)(x+6)+ 2(x+1)(x+12)(x+6)(x+8)+ 2(x+10)(x+12)=10(x+8)(x+10)+ 2(x+2)(x+4)+ 2