x + x * x = x + x
<=> x + x2 = 2x
<=> x2 = x
<=> x = 1
\(x+x\times x=x+x\)
\(\Rightarrow x+x^2=2x\)
\(\Rightarrow x^2=2x-x\)
\(\Rightarrow x^2=x\)
\(\Rightarrow x=x=1\)
1 x 2 = ?
1 x 2 x 3 = ?
1 x 2 x 3 x 4 = ?
1 x 2 x 3 x 4 x 5 = ?
1 x 2 x 3 x 4 x 5 x 6 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 = ?
(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)-(-x)=108
98 x 456 x 123 x 753 x 246 x 2222 x 11 x 11 x 11 x 25 x 36 x 25 x 12 x 13 x 159 x 487 x 258 x 12589 x 1524 x ( 36987 - 36987 ) = ?
2 x 2 x 2x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2x 2 x 0=
câu hỏi đây ;3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3
2 x 2 x 2 x 2 x 2 x 2 x2 x 2 x 2 x 2 x 2 = 2 x .......
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 =
Tính nhẩm :
2 x 3 = ... 2 x 2 = ...
2 x 5 = ... 2 x 4 = ...
2 x 7 = ... 2 x 6 = ...
2 x 8 = ... 2 x 1 = ...
2 x 9 = ... 2 x 10 = ...
các bạn ơi giúp tớ với
2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = ?
2 x 2 x 2 x 2 x 2 x 2 x 2 x 0 = ?
