Question

Cálculo algébrico (:

a) 7m-[t-(3m+2t)-4]

b) 8ab+5b-3a-[4ab+(9a-6b)-12]

c) x4+3xy-(13xy+7x4)-20xy+8x4

Se algum puder me ajudar, obrigada!!

Answer 1

a)
7m-[t-(3m+2t)-4]=
7m-[t-3m-2t-4]=
7m-[-3m-t-4]=
7m+3m+t+4=
10m+t+4

b)
8ab+5b-3a-[4ab+(9a-6b)-12]=
8ab+5b-3a-[4ab+9a-6b-12]=
8ab+5b-3a-4ab-9a+6b+12=
4ab+11b-12a+12

c)
x4+3xy-(13xy+7x4)-20xy+8x4=
9x4-17xy-13xy+7x4=
16x4-30xy