A= (x+y-4) – (x-y+1) +(x-5) B = (a-b-c+d) – (b-c-d) – (a-b-d) 06/12/2021 Bởi aihong A= (x+y-4) – (x-y+1) +(x-5) B = (a-b-c+d) – (b-c-d) – (a-b-d)
$\text{Giải thích các bước giải:}$ $A = (x + y – 4) – (x – y + 1) + (x + 5)$ $= x + y – 4 – x + y – 1 + x + 5$ $= (x – x + x) + (y + y) – (4 + 1 – 5)$ $= x + 2y$ $B = (a – b – c + d) – (b – c – d) – (a – b – d)$ $= a – b – c + d – b + c + d – a + b + d$ $= (a – a) – (b + b – b) – (c – c) + (d + d + d)$ $= -b + 3d$ $\huge\text{Hok tốt !}$ Bình luận
A=(x+y-4)-(x-y+1)+(x-5) =>x+y-4-x+y-1+x-5 =>2y+x-10 B,(a-b-c+d)-(b-c-d)-(a-b-d) =>a-b-c+d-b+c+d-a+b+d =>3d-b Bình luận
$\text{Giải thích các bước giải:}$
$A = (x + y – 4) – (x – y + 1) + (x + 5)$
$= x + y – 4 – x + y – 1 + x + 5$
$= (x – x + x) + (y + y) – (4 + 1 – 5)$
$= x + 2y$
$B = (a – b – c + d) – (b – c – d) – (a – b – d)$
$= a – b – c + d – b + c + d – a + b + d$
$= (a – a) – (b + b – b) – (c – c) + (d + d + d)$
$= -b + 3d$
$\huge\text{Hok tốt !}$
A=(x+y-4)-(x-y+1)+(x-5)
=>x+y-4-x+y-1+x-5
=>2y+x-10
B,(a-b-c+d)-(b-c-d)-(a-b-d)
=>a-b-c+d-b+c+d-a+b+d
=>3d-b