Question 72

If $$p+q=7$$ and $$pq=5$$, then the value of $$p^{3}+q^{3}$$ is:

Solution

$$p^{3}+q^{3} = (p + q)^3 - 3pq(p + q)$$

=$$7^3 - 3 \times 5(7)$$

= 343 - 105 = 238


Create a FREE account and get:

  • Free SSC Study Material - 18000 Questions
  • 230+ SSC previous papers with solutions PDF
  • 100+ SSC Online Tests for Free

cracku

Boost your Prep!

Download App