Объяснение:
а)[tex] \frac{2a + \frac{5}{ {a}^{2} } + 5 - a - 2 }{ {a}^{2} + 9} = \frac{a + \frac{5}{ {a}^{2} } + 3 }{ {a}^{2} + 9} = \frac{ {a}^{3} + 5 + 3 {a}^{2} }{ \frac{ {a}^{2} }{ {a}^{2} + 9} } = \frac{ {a}^{3} + 5 + 3 {a}^{2} }{ {a}^{2} \times ( {a}^{2} + 9) } = \frac{ {a}^{3} + 3 {a}^{2} + 5}{ {a}^{4} + 9 {a}^{2} } [/tex]
б) 3а/4b + 2b/4b = 3a/4b + 1/2 = 3a+2b/4b
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Объяснение:
а)[tex] \frac{2a + \frac{5}{ {a}^{2} } + 5 - a - 2 }{ {a}^{2} + 9} = \frac{a + \frac{5}{ {a}^{2} } + 3 }{ {a}^{2} + 9} = \frac{ {a}^{3} + 5 + 3 {a}^{2} }{ \frac{ {a}^{2} }{ {a}^{2} + 9} } = \frac{ {a}^{3} + 5 + 3 {a}^{2} }{ {a}^{2} \times ( {a}^{2} + 9) } = \frac{ {a}^{3} + 3 {a}^{2} + 5}{ {a}^{4} + 9 {a}^{2} } [/tex]
б) 3а/4b + 2b/4b = 3a/4b + 1/2 = 3a+2b/4b