Question 72

If a - b = 5 and ab = 2, then $$a^3 - b^3$$ is equal to:

Solution

We know that, $$a^{3}-b^{3}$$ = $$(a-b)^{3}+3ab(a-b)$$

= $$(5)^{3}+3\times2(5)$$

= 125+ 30

= 155

View More Questions From Algebra

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

maruti sir image

Free SSC Quant Questions

SSC Data Interpretation

SSC Linear Equations

SSC Number Systems

SSC Quadratic Equations

SSC Trigonometry