Question

Упростите выражение при b= - 1,5.
$(4+b)^{3} - b^{2}(b+12) =$

Answer 1

(4+b)³-b²*(b+12)=4³-3*4² *b+3*4*b²-b³-b³-12b²=64-48b+12b²-b³-b³-12b²=
=64-48b-2b³
64-48*(-1,5)-2*(-1,5)³=64+72+6,75=142,75