If 6 J of work is needed to stretch a spring from 10 cm to12 cm and another 10 J is needed to stretch it from 12 cmto 14 cm, what is the natural length of the spring?

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter12: Quadratic Functions
Section12.6: Solving Problems Involving Quadratic Equations
Problem 1.4E
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If 6 J of work is needed to stretch a spring from 10 cm to
12 cm and another 10 J is needed to stretch it from 12 cm
to 14 cm, what is the natural length of the spring?

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