Question

Answer 1

a)Thay \(x=-1,26\) vào A ta được:

\(A=\left(-1,26+13,67\right)\cdot\left(-10\right)+136,7\)

   \(=12,41\cdot\left(-10\right)+136,7=-124,1+136,7=12,6\)

b)Thay \(a=19,2;b=79,8\) vào B:

\(B=19,2\cdot\left(-23,5\right)+79,8\cdot\left(-23,5\right)-23,5\)

 \(=-23,5\cdot\left(19,2+79,8+1\right)=-23,5\cdot100=-2350\)

c)Thay \(x=-0,63\) vào C ta được:

\(C=-0,63\cdot45,4-\left(-0,63\right)\cdot\left(-54,6\right)\)

   \(=-0,63\cdot\left(45,4+54,6\right)=-0,63\cdot100=-63\)