Hỏi đáp về Dấu của nhị thức bậc nhất - Đại số 10

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Giúp em với ạ

Giải phương trình \(f(x) = -x^2-4\)?
            [subject_code] => toan-hoc
            [grade_code] => lop-10
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Giúp mình bài 1 với ạ


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            [faq_content] => 
Giúp e giải đề vs ạ


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            [faq_title] => Giải bpt|x^2-2x| 
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            [faq_title] => Giải các BPT sau:
            [faq_code] => 
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Lập bảng biến thiên


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            [faq_code] => 
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Lập bảng xét dấu f(x)=3x^2-x-2
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            [faq_code] => 
            [faq_content] => Bảng xét dấu hộ ạ 

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            [faq_code] => 
            [faq_content] => 1, f(x) =(4x 1).(x-2).(3x 5).(-2x 7) 

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            [faq_content] => 

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Câu 10. Tập nghiệm của bất phương trình |x-5x+ 2|+ 2 < 5x là:

в. [-2:2]. 

A. (-0; -2]U[2; +0).

c. [0;10]. 

D. (-0;0]U[10; +∞).
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            [faq_content] => Giải bất phương trình sau: x(x-1)(x 2)<0
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Biểu thức f(x)=(x-3)(1-2x) âm khi x thuộc
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ight| > left| {frac{{x + 1}}{{{x^2} - 9}}} 
ight|)?
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            [faq_content] => 

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            [faq_content] => Câu này mình làm không ra, các bạn giúp mình nhé 

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            [faq_content] => Giúp mình với ạ 

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            [faq_content] => 

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            [user_username] => 
            [member_email] => 
            [member_firstname] => Liêm Lê
            [member_lastname] => 
            [member_avata] => images/avatar/library/3.jpg
            [member_createdate] => 2020-02-16 13:20:04
            [member_numpoint] => 4
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    [24] => Array
        (
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            [faq_title] => Cho biểu thức f(x)=(2x-1)(x^3-1), tập hợp các giá trị của x thỏa mãn bất phương trình f(x) >= 0?
            [faq_code] => 
            [faq_content] => Giúppp mình vớiiii mng oiii
            [subject_code] => toan-hoc
            [grade_code] => lop-10
            [faq_createdate] => 2020-02-15 23:10:49
            [faq_num_answer] => 1
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 442218
            [user_username] => 
            [member_email] => quyenbao424@gmail.com
            [member_firstname] => 
            [member_lastname] => baoquyen248
            [member_avata] => 38401577539740.jpg
            [member_createdate] => 2019-10-09 23:58:24
            [member_numpoint] => 2
            [member_isninja] => 0
            [faq_point] => 0
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)