1) 5a^6 / b^8 : (10a^3b^2)= 5a^6 / b^8 1 / (10a^3b^2)= 5a^6 / b^8 1 / (10a^3b^2)= 5 / 10 a^6 / a^3 1 / b^8 / b^2= 1/2 a^(6-3) 1 / b^(8-2)= 1/2 * a^3 / b^6
2) (3x + 9) / (x^2 - 2x) : (x + 3) / (4x - 8)= (3(x + 3)) / (x(x - 2)) : (x + 3) / 4(x - 2)= 3 / x - 2 / (1 / 4)= 3 * 4 / x= 12 / x
3) (n^2 - 3n) / (64n^2 - 1) : (n^4 - 27n) / (64n^2 + 16n + 1)= (n(n - 3)) / ((8n - 1)(8n + 1)) : n(n^3 - 27) / ((8n + 1)(8n + 1))= (n(n - 3) / (8n - 1)(8n + 1)) * (8n + 1) / (n(n - 3)(n^2 + 3n + 9))= 1 / n(n^2 + 3n + 9)
1) 5a^6 / b^8 : (10a^3b^2)
= 5a^6 / b^8 1 / (10a^3b^2)
= 5a^6 / b^8 1 / (10a^3b^2)
= 5 / 10 a^6 / a^3 1 / b^8 / b^2
= 1/2 a^(6-3) 1 / b^(8-2)
= 1/2 * a^3 / b^6
2) (3x + 9) / (x^2 - 2x) : (x + 3) / (4x - 8)
= (3(x + 3)) / (x(x - 2)) : (x + 3) / 4(x - 2)
= 3 / x - 2 / (1 / 4)
= 3 * 4 / x
= 12 / x
3) (n^2 - 3n) / (64n^2 - 1) : (n^4 - 27n) / (64n^2 + 16n + 1)
= (n(n - 3)) / ((8n - 1)(8n + 1)) : n(n^3 - 27) / ((8n + 1)(8n + 1))
= (n(n - 3) / (8n - 1)(8n + 1)) * (8n + 1) / (n(n - 3)(n^2 + 3n + 9))
= 1 / n(n^2 + 3n + 9)