(x-2).(x+3)=15 mk đang cần gấp...

1 câu trả lời

Đáp án+giải thích các bước giải:

( x - 2 ) . ( x + 3 ) = 15

{x=15+2x=153

{x=17x=12

vậy x = 17 và x = 12

 

Câu hỏi trong lớp Xem thêm

Task 4A: Write the correct form of the verbs in parenthesis on the spaces provided. 1. She met him while she ___________________ (travel) on a train. 2. While the woman was getting off the bus, she_______________ (fall down). 3. The thief ___________________ (break) into while we were sleeping. 4. John took a photo while I ____________________ (not/look). 5. While my mum was working in the garden, she _______________ (hurt) her back. 6. We were living in Madrid when our old aunt________________ (die). 7. When I got up this morning, it _________________ (rain) heavily. 8. While my dad was brushing teeth, my mum _______________ (fall asleep). 9. I saw a nightmare while I ___________________ (sleep) last night. 10. What happened in your dream while a monster ___________________ (chase) you? Task 4B: Write the correct form of the verbs to complete the sentences. 1. I _______________ (study) History when my friends__________________ (come) around. 2. While Susan_______________ (walk) in the street, she ____________ (meet) an old friend. 3. Her baby_________________ (wake) up while she __________________ (clean) the house. 4. He __________________ (work) when her wife _______________________ (phone) him. 5. The students ______________ (have) a test when the storm ____________ (start). 6. We ______________ (see) a falling star while we ________________ (go) fishing in the lake. 7. Susan______________ (fall) down while she ___________________ (climb) the ladder. 8. I ___________________ (walk) along the road when I_____________ (see) you with her. 9. Tom _______________ (burn) his hand while he _________________ (cook) the dinner. 10. Daddy _______________(fall) asleep while he __________________ (read) a book.

1 lượt xem
1 đáp án
10 phút trước