g) `2a^2 + 5ab - 3b^2`

`= 2a^2 + 6ab - ab - 3ab^2`

`= 2a(1 + 3b) - ab(1 + 3b)`

`= (1 + 3b)(2a - ab)`

`= a(1 + 3b)(2 - b)`

h) `6x^4 - 11x^2 + 3`

`= 6x^4 - 2x^2 - 9x^2 + 3`

`= 2x^2(3x^2 - 1) - 3(3x^2 - 1)`

`= (3x^2 - 1)(2x^2 - 3)`

`-------`

a) `x^3 - 16 = 0`

`x^3 = 16`

`x =` `\root{3}{16}`

Vậy `x = \root{3}{16}`

b) `5x(x-1) = x - 1`

`<=> 5x(x-1) - (x-1) = 0`

`<=> (x-1)(5x-1) = 0`

`<=> [(x-1=0),(5x-1=0):}`

`<=> [(x=1),(x=1/5):}`

Vậy `x in {1;1/5}`

c) `2(x+5) - x^2 - 5x = 0`

`<=> 2(x+5) - x(x+5) = 0`

`<=> (x+5)(2-x) = 0`

`<=> [(x+5=0),(2-x=0):}`

`<=> [(x=-5),(x=2):}`

Vậy `x in {-5;2}`

`\ttcolor{cyan}{#PUyen}`