Срочно плиз алгебра​

Question

Срочно плиз алгебра​

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Answer 1

1) (2a + 1)/2
2) (4x - 3)/5
3) (a-1)/(a+1)

Answer 2

1.  4a^2 - 1/4a - 2 = (2a - 1)(2a+1)/2*(2a-1) = 2a + 1/2 = a + 0,5

2. 16x^2 - 9/20x + 15 = (4x-3)(4x+3)/ 5*(4x + 3) = 4x-3/5 = 0,8x - 0,6

3. a^2 + 2a + 1/a^2 - 1 = (a + 1)^2/(a-1)(a+1) = a + 1/a - 1