Question

bỏ ngoặc rồi rút gọn biểu thức

lm từng bước giúp mk nhé

Answer 1

h) \(\left(a-b\right)-\left(c-d\right)-\left(a+d\right)-\left(b+c\right)\)

\(=a-b-c+d-a-d-b-c\)

\(=\left(a-a\right)-\left(b+b\right)-\left(c+c\right)+\left(d+d\right)\)

\(=-2b-2c\)

i) \(-\left(-a+c-d\right)-\left(c-a+d\right)\)

\(=a-c+d-c+a-d\)

\(=\left(a+a\right)-\left(c+c\right)+\left(d+d\right)\)

\(=2a-2c\)

k) \(-\left(a+b-c+d\right)+\left(a-b-c-d\right)\)

\(=-a-b+c-d+a-b-c-d\)

\(=\left(-a+a\right)-\left(b+b\right)+\left(c-c\right)-\left(d+d\right)\)

\(=-2b-2d\)

n) \(-a\left(-b-c+d-e\right)-\left(-a\right)-\left(-b+c-d\right)\)

\(=ab+ac-ad+ae+a+b-c+d\)