ANUJ P.

asked • 08/21/15

sum of two no. is 42 and multiplication of two no. 437. so what is the difference of two no.

let the number's are x and y
X+Y=42
XY=437
 
so, find the difference of x and y

4 Answers By Expert Tutors

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Andrew M. answered • 08/21/15

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Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

Shradha S. answered • 08/21/15

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Experienced Maths Teacher with Master's Degree in Mathematics

Michael J. answered • 08/21/15

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Effective High School STEM Tutor & CUNY Math Peer Leader

Christine L. answered • 08/21/15

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ANUJ P.

THANK U SO MUCH YOUR ANSWER IS CORRECT.
BUT I DON'T NOW y = -b ±√(b2-4ac)2a FORMULA
 
Report

08/21/15

Christine L.

The formula y = -b ±√(b2-4ac)/2a is called the Quadratic Formula and it is used to solve for x. It is used in many math levels, and is likely introduced in Middle School and still used in High School courses.

Here is a link that may explain it on PurpleMath: http://www.purplemath.com/modules/quadform.htm
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08/21/15

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