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(5x – 25) / x^2 – 25

0 votes
Simplify the expression
asked Mar 30, 2013 in ALGEBRA 1 by andrew Scholar

1 Answer

0 votes

(5x - 25)  / (x2 - 25)

Take out common term 5 in the above expression

5(x - 5) / (x2 - 52)

Recall : a2 - b2 = (a - b)(a + b)

Substitute a = x and b = 5 in the above formula a2 - b2

5(x - 5) / (x - 5)(x + 5)

Cancel the common term x - 5

5 / x + 5

or

5(x + 5)-1.

answered Mar 30, 2013 by diane Scholar

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