If p=7−4√3 then find the value of p2+17p
p2+17p=(7−4√3)2+17(7−4√3)=49+48−56√3+149−28√3=98−56√349−28√3=2(49−28√3)49−28√3=2
If p = −2, find the value of:
(i) 4p + 7
(ii) −3p2 + 4p + 7
(iii) −2p3 − 3p2 + 4p + 7