Question

Guys please solve all questions from 12 till 17.
I will mark the correct answer as "brainliest".
I will also report wrong answers. ​

Answer 1

Answer:

Step-by-step explanation:

12 2/x2  - 5/x + 2 = 0

⇒ 2 – 5x + 2x2/x2 = 0

⇒ 2x2 – 5x + 2 = 0

⇒ 2x2 – 4x – x  + 2 = 0

⇒ 2x(x – 2) - 1(x - 2) = 0

⇒ (x – 2)(2x – 1) = 0

⇒ x – 2 = 0

Or     2x – 1 = 0

⇒ x  = 2

or    x = 1/2 are two roots of the equation.

13  4√3 x² +5x -2√3 =0

⇒4√3 x² +8x -3x -2√3=0

⇒4x(√3 x+2) -√3(√3x +2) =0

⇒(√3x +2)(4x -√3) =0

⇒(√3x +2) =0 or (4x-√3) =0

⇒x = -2/√3 or √3/4

15 i dont know