1 votes 1 votes If $p^{3} + 3p^{2} + 3p = 7,$ then the value of $p^{2} + 2p$ is : $1$ $3$ $5$ $15$ Quantitative Aptitude nielit2022feb-scientistc + – Lakshman Bhaiya asked Jul 21, 2022 edited Aug 5, 2022 by Lakshman Bhaiya Lakshman Bhaiya 13.7k points 586 views answer comment Share See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Given that: $p^3+3p^2+3p=7$,put $p=1$ we will get LHS=RHS,for $p=1$ given equation satisfied. so the value of $p^2+2p=1+2=3$ Option (B) is correct. Hira Thakur answered Sep 5, 2022 Hira Thakur 7.1k points comment Share See all 0 reply Please log in or register to add a comment.
0 votes 0 votes (p+1)^3 = p^3 + 1 + 3p(p+1) =[p^3+3p^2+3p] + 1 =7+1=8 therefore p+1=2 => p=1 so answer is 3 Shamshuddin answered Sep 18, 2022 Shamshuddin 34 points comment Share See all 0 reply Please log in or register to add a comment.