Question

Bỏ dấu ngoặc thu gọn biểu thức:

a+{(a-3)-[(a+3)+(a-2)]}

[a+(a+3)]-[(a+2)-(a-2)].Ai trả lời nhanh nhất mk sẽ theo dõi và tick.

Answer 1

1.\(a+\left\{\left(a-3\right)-\left[\left(a+3\right)+\left(a-2\right)\right]\right\}\)

\(=a+\left\{a+3-\left[a+3+a-2\right]\right\}\)

\(=a+\left\{a+3-a-3-a+2\right\}\)

\(=a+a+3-a-3-a+2\)

\(=a+a-a-a+3+2\)

\(=5\)

2. [a+(a+3)]-[(a+2)-(a-2)]

\(=\left[a+a+3\right]-\left[a+2-a+2\right]\)

\(=a+a+3-a-2+a-2\)

\(=a+a-a+a+3-2-2\)

\(=2a+\left(-1\right)\)

... ( chắc sai r... > . < ....) ...

Answer 2

1/a+[(a-3)-(a+3+a-2)=a+(a-3-a-a-+2-3)=a+a-3+2-3-a-a-=-4

2/(a+a+3)-(a+2-a+2)=2a+3-4=2a-1

Answer 3

đù...nghe cái theo dõi vs tick hay v~...> . <....