11-10-2015
Mathematics

Answered

2x^2+7x-15=0

If r and s are two solutions of the equation above and r > s, which of the following is the value of r-s?

Verified Answer :

13-10-2017

First step is to factorize the given expression as follows:
2x^2 + 7x - 15 = (2x-3)(x+5)
This means that the two roots of the equation are 3/2 (or 1.5) and -5

Now, we will get r and s:
we are given that the value of r is greater than the value of s, since 1.5 is greater than -5, therefore:
r = 1.5
s = -5

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