Bỏ ngoặc ra rồi tính bình thường

bỏ ngoặc nha bn

nhấn vào đúng 0 sẽ ra

c,f  fk,l,xskooe

a, = a+b-c-b+c-d

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

=a+0-0-d

=a-d

các câu khác tương tự

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

=  a + b - c - b + c - d

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

= a + 0 - 0 - d

= a - d

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

= -a - b - c + a - b + d

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

=  -2b - c + d

câu c) tương tự nhé!! 34656654745756876876457567568687687698798363645765756

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

= a + b - c - b + c - d

= a - d

b) -(a - b + c) + (a - b + d)

= -a + b - c + a - b + d

= -c + d

= d - c

c) (a + b) - (-a + b - c)

= a + b + a - b + c

= 2a + c

\(\text{a) -b-(b-a+c) }\)

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

\(=-2b+a-c\)

\(\text{ b) -(a-b+c)-(c-a)}\)

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

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

\(=-b+\left(-2c\right)\)

\(\text{c) b-(b+a-c)}\)

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

\(=-a+c\)

\(\text{ d) a-(-b+a-c)}\)

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

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

\(=b+c\)

học tốt

a) -b-(b-a+c)

= −b − b + a − c

= −2b + a − c

b) -(a-b+c)-(c-a)

= −a − b − c − c + a

= −a + a + −b + −c − c

= −b + −2c

c) b-(b+a-c)

= b − b − a + c

= −a + c

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

= a + b − a + c

= a − a + b + c

= b + c

Tham khảo

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

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

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

\(A=0\)

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

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

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

\(B=d+b\)

a) Ta có: \(A=\left(b+a\right)+\left(c-d\right)-\left(c+a\right)-\left(b-d\right)\)

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

=0

b) Ta có: \(B=\left(a-d\right)-\left(a+d\right)-\left(c-d\right)+\left(c+b\right)\)

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

=b-d

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

=a + b - c - b + c - d

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

=a + 0 - c² - d

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

=-a + b - c + a - b + d

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

=0 + 0 - c + d

c) -(a + b) - (-a - b + c)

=-a - b + a + b - c

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

=0 - b² - c

d)(a - b) - (c - d) - (a - c)

=a - b - c + d - a + c

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

=0 - b - c² + dd

Mỏi cả tay😧