question_answer

(a) If z=10 find the value of\[{{z}^{3}}-3\left( z-10 \right)\].

(b) If p=-10 find the value of\[{{p}^{2}}-2p-100\].

Answer:

(a) When z = 10, then z3 - 3(z - 10) == (10)3 » 3(10 -10) = 1000 - 3(0) = 1000 - 0 = 1000                                                                                                                     (b) When p = 10, then \[{{p}^{2}}-2p-100={{\left( -10 \right)}^{2}}-2\left( -10 \right)-100\] = 100 + 20 - 100 =20