Question

Упростите: 6a-1 / 2a² + 6a      +     10-3a/a²-9
A) 1 / 2a(a-3)
B) 1 / 2a(a+3)
C) 3 / 2a(a-3)
D) 3 / 2a(a+3)

Answer 1

$frac{(6a - 1)(a - 3) + 2a(10 - 3a)}{2a( {a} - 3)(a + 3)} = frac{6 {a}^{2} - 19a + 3 + 20a - 6 {a}^{2} }{2a(a - 3)(a + 3)} = frac{a + 3}{2a(a - 3)(a + 3)} = frac{1}{2a(a - 3)}$