CAT Quant sample question : Algebra - quadratic equation, real roots : Ascent Education - CAT Coaching classes

Ascent Education - TANCET, MBA Entrance Training Classes
 
Latest News LATEST NEWS
Ascent Success Stories
TANCET 16 Classes @ ChennaiXAT 16 Classes @ Chennai
Connector
Ascent's Courses
 
Contact Us
+91 44 4500 8484
+91 96000 48484
You are here: Home CAT Questions Algebra Quadratic equations - roots

Quadratic Equation : CAT 2016 Quant/Math Questions Answers

Question 4 the day : February 12, 2003
The question for the day is from the topic Quadratic Equations in Algebra.

Question
For what values of 'm' is y = 0, if y = x2 + (2m + 1)x + m2 - 1?   x is a real number.

(1) m -2
(2) m < 0
(3) m = 0
(4) m -1.25

Correct Answer is m -1.25 . Correct Choice is (4)

Explanatory Answer

When x is real, then the discriminant of a quadratic equation (ax2 + bx + c = 0) 0.
i.e. D = b2 - 4ac 0

In this case, (2m + 1)2 4(m2 - 1)
4m2 + 4m + 1 4(m2 - 1)
Solving for m, we get m - 1.25


More Questions on Linear, Quadratic and Cubic Equations - Algebra

XLRI XAT TANCET Practice Question Samples



 
Quick Links
TANCET Questionbank  
TANCET MBA MCA Practice Questions with detailed explanation and shortcuts. TANCET Sample Questions

GMAT Math Books  
Comprehensive study material for GMAT Quant. 1800+ questions. GMAT Quant Books

TANCET Diagnostic Test  
Free Online TANCET diagnostic test with video explanation. TANCET Diagnostic Test

GMAT Diagnostic Test  
Free GMAT Online Diagnostic Test with video explanation. Take the test!

CAT classes @ Chennai  
CAT 2010 intensive batch starts Jan 23, 10. Faculty includes IIM graduates. Personal attention. Online Mock CATs & Analysis. CAT Math and DI crash course

GMAT Math Lesson Book | SAT prep | GRE Classes @ Chennai | GMAT Coaching @ Chennai | TANCET Mailing List
© 2002 - 17 ASCENT Education all rights reserved. Terms & Condition | Privacy Policy