Divide. x² + 2x + 1 / x² - 1 ÷ ( 2x² + 2x ).

Mathematics
Tutor: None Selected Time limit: 1 Day

Divide. x² + 2x + 1 / x² - 1   ÷  ( 2x² + 2x ).

a.  x + 1 / 2x

b.  2x(x + 1)²  / x + 1

c.  1/2

d.  1 / 2x(x - 1 )

Apr 30th, 2015

(x2 + 2x + 1)/(x2 – 1) ÷ (2x2 + 2x) =                 put the divisor into the denominator

(x2 + 2x + 1)/[(x2 – 1)(2x2 + 2x)] =                   factor by using gcd and formulas

(x + 1)2/[(x + 1)(x – 1)2x(x + 1)] =                    cancel the common factors

1/[2x(x – 1)] 

Answer: D


Apr 30th, 2015

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