Question

plz ans this question plz plz​

Answer 1

Answer:

2

Step-by-step explanation:

your please question

Answer 2

Question:

Which of the following are quadratic equation ?

$1. \: x - \frac{5}{x} = 3x - 9$

$2. \: (x + 3)(x - 4) = 0$

$3. \: \frac{5}{x} - 3 = x {}^{2}$

$4. \: n {}^{3} - n + 4 = n {}^{3}$

$5. \: x - 3 = 4x {}^{2}$

Answer :-

Equation 1 , 2 and 5 are quadratic equations.

Step by step explanation :

$1. \: x - \frac{5}{x} = 3x -9 \\ x {}^{2} - 5 = 3x {}^{2 } - 9x \\ 2x {}^{2} - 9x + 5$

$2. \: (x + 3)(x - 4) = 0 \\ x {}^{2} - x - 12 = 0$

$3. \: \: \frac{5}{x} - 3 = x {}^{2} \\ \: \: \: \: \: \: \: \: 5 - 3x = x {}^{3}$

$4. \: n {}^{3} - n + 4 = n {}^{3} \\ - n + 4 = 0$

$5. \: x - 3 = 4x {}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: 4x {}^{2} - x + 3 = 0$

Hope this will help you