Question:`p = a^2 + 3a - 4, Q = a^2 - 1, R = a^2 + 5a + 4` ক. p এর উৎপাদক কতটি? খ. P Q R এর ল,সা,গু নির্ণয় কর। গ. সরল কর: `(3a)/P + (2a)/Q + a/(a^2 + 5a + 4)` 

Answer ক দেওয়া আছে, `P = a^2 + 3a - 4` `= a^2 + 4a - a - 4` `= a (a + 4) - 1(a + 4)` = (a + 4) (a - 1) সুতরাং p এর উৎপাদক 2টি। খ. ‘ক’ থেকে পাই, p = (a + 4) (a - 1) দেওয়া আছে, Q =` a^2 - 1` = (a + 1) (a - 1) এবং R` = a^2 + 5a + 4` =` a^2 + 4a + a + 4` =` a(a + 4) + 1(a + 4)` =` (a + 4) (a + 1)` :. P, Q, R এর ল,সা,গু = (a + 4) (a - 1) (a + 1) = `(a + 4) (a^2 - 1)` গ. প্রদত্ত রাশি `= (3a)/(a^2 + 3a - 4) + (2a)/(a^2 - 1) + a/(a^2 + 5a + 4)` `= (3a)/(a^2 + 4a - a - 4) + (2a)/((a + 1)(a - 1)) + a/(a^2 + a + 4a + 4)` `= (3a)/((a + 4)(a - 1)) + (2a)/((a + 1)(a - 1)) + a/((a + 1)(a + 4))` `= (3a(a + 1) + 2a(a + 4) + a(a - 1))/((a + 4)(a + 1)(a - 1))` `= (3a^2 + 3a + 2a^2 + 8a + a^2 - a)/((a + 4)(a + 1)(a - 1))` `= (6a^2 + 10a)/((a + 4)(a + 1)(a - 1))` `= (2a(3a + 5))/((a + 4)(a^2 - 1))` 

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`p = a^2 + 3a - 4, Q = a^2 - 1, R = a^2 + 5a + 4` ka. p ar utpadok kototi? kh. P Q R ar l,sha,gu nirony karo. ga. shorol karo: `(3a)/P + (2a)/Q + a/(a^2 + 5a + 4)`
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