Question

c)(1/4.x^2 - 3.x = 0

Answer 1

`1/4 x^2 - 3x = 0`

`<=> x (1/4 x - 3) = 0`

`<=> x = 0` hoặc `1/4x - 3 = 0`

`<=> x = 0` hoặc `1/4x = 3`

`<=> x = 0` hoặc `x = 12`

Vậy  ...

Answer 2

 \( \frac{1}{4} x^2 - 3x = 0 \)

= \( ax^2 + bx + c = 0 \).
\[
4 \left( \frac{1}{4} x^2 - 3x \right) = 4 \cdot 0
\]
\[
x^2 - 12x = 0
\]
\[
x(x - 12) = 0
\]

1. \(x = 0\)
2. \(x - 12 = 0 \Rightarrow x = 12\)