Question 47

If $$xy + yz + zx = 0$$, then $$(x + y + z)^2$$ equals

Solution

$$(x+y+z)^2 = x^2 + y^2 + z^2 + 2(xy + yz + xz)$$
as $$xy+yz+xz = 0$$
so equation will be resolved to $$x^2 + y^2 + z^2$$

Share on Whatsapp Share on Whatsapp

Boost your CAT prep: Take All-India 3 free CAT mock tests with Video solutions

Your Doubts

Ask a Doubt (know more)

Drop Your File Here!

Create a FREE account and get:

All Quant CAT complete Formulas and shortcuts PDF
38+ CAT previous year papers with video solutions PDF
5000+ Topic-wise Previous year CAT Solved Questions for Free

CAT Quant Questions | CAT Quantitative Ability

CAT Simple Interest Compound Interest Questions CAT Time Speed Distance Questions CAT Arithmetic Questions CAT Logarithms, Surds and Indices Questions CAT Averages Questions

CAT DILR Questions | LRDI Questions For CAT

CAT Coins and Weights Questions CAT Truth Lie Concept Questions CAT Venn Diagrams Questions CAT Special Charts Questions CAT Games and Tournamnents Questions

CAT Verbal Ability Questions | VARC Questions For CAT

CAT Verbal Ability Questions CAT Para Summary Questions CAT Miscellaneous Questions CAT Vocabulary Questions CAT Reading Comprehension Questions

Follow us on

Boost your Prep!

Download App