Toán cho bieu thuc a=(-a-b+c)-(-a-b-c) rut gon a vatinh gia tri cua a khi a 09/07/2021 By Vivian cho bieu thuc a=(-a-b+c)-(-a-b-c) rut gon a vatinh gia tri cua a khi a
Bài giải
A = ( – a – b + c ) – ( – a – b – c )
A = – a – b + c + a + b + c
A = 2c
Bài giải
A = ( – a – b + c ) – ( – a – b – c )
A = – a – b + c + a + b + c
A = 2c