4(x - 5) + x^2 - 5x = 0

<=> 4(x - 5) - x( x - 5) = 0

<=> (x - 5)(4 - x) = 0

=> x - 5 = 0 hoặc 4 - x = 0

* x - 5 = 0

=> x = 5

* 4 - x = 0

=> x = 4

Vậy x = 5 hoặc x = 4

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each of sentences in the following questions.

The college was closed for a month. It was the summer holidays.

A. The college was closed for a month as a result of the summer holidays.

B. The college was closed for a month as a result of that it was the summer holidays

C. The college was closed for a month owing the fact of the summer holidays

D. The college was closed for a month because the summer holidays

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

The factory has to take on 200 workers in order to complete the plan.

A. fire

B. employ

C. lay off

D. apply