jessej1203 jessej1203
  • 10-02-2019
  • Mathematics
contestada


[tex] \frac{x + 2}{ {x}^{2} - 9 } \times \frac{x + 3}{ {x}^{2} - 4 } [/tex]
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tex fracx 2 x2 9 times fracx 3 x2 4 tex class=

Respuesta :

jimrgrant1 jimrgrant1
  • 10-02-2019

Answer:

[tex]\frac{1}{(x-3)(x-2)}[/tex]

Step-by-step explanation:

Factorise the denominators of both fractions

x² - 9 and x² - 4 are both differences of squares and factor as

x² - 9  = (x - 3)(x + 3) and x² - 4 = (x - 2)(x + 2), thus express as

[tex]\frac{x+2}{(x-3)(x+3)}[/tex] × [tex]\frac{x+3}{(x-2)(x+2)}[/tex]

Cancel the factors (x + 3) and (x + 2) from the numerators/denominators of both fractions leaving

[tex]\frac{1}{(x-3)(x-2)}[/tex]



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