Đáp án + Giải thích các bước giải:
`a)`
`4x^{2}-4x-3`
`=(4x^{2}-6x)+(2x-3)`
`=2x(2x-3)+(2x-3)`
`=(2x-3)(2x+1)`
`b)`
`3x^{2}+7x-10`
`=(3x^{2}-3x)+(10x-10)`
`=3x(x-1)+10(x-1)`
`=(x-1)(3x+10)`
`c)`
`2x^{2}-10x+12`
`=(2x^{2}-6x)-(4x-12)`
`=2x(x-3)-4(x-3)`
`=(x-3)(2x-4)`
`=2(x-3)(x-2)`
`d)`
`3x^{2}+15x-42`
`=(3x^{2}-6x)+(21x-42)`
`=3x(x-2)+21(x-2)`
`=(x-2)(3x+21)`
`=3(x-2)(x+7)`
Giúp nha. Nhanh 10' tui còn làm bài khc? B2. điền'' more/less/ fewer'' vào chỗ trống sao cho hợp lí 1.My company has.............employees than your company because mine has about one hundredemployees but yours has almost two hundred 2.Jim learns better than Jane. He has .................good grades than jane 3. Because of water pollution , nowadays there is..........fresh water than in the past 4.My neighborhood is more peacefull than your neighborhood.Yours has criminal cases than mine 5.There are ..............industrial emissions in the city than in the countryside 6.Nowadays people spend ................money on education than in the past 7.I hope this year we will harvest ...................rice than last year, so we won't be worried about famine 8.Many people are moving to the city because there are..........job opportunities there than in the countryside 9.the government are trying to raise the living standards of people.I think that there will be slum areas in the future 10.Underdeveloped countries have to deal with................problems than developed countries
use the present perfect of the verb Mrs Brown / work / in a bank / a long time -> I / wait for hom / two o'clock ->
Giải em vs cảm ơn đc vote 5 sao
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Nhập vào một xâu,in ra đảo ngược của các kí tự trong xâu đó Vd: nix oahc In ra xin chao
1 Underline the correct preposition 1 donot sit in / on / under / this stool . It is broken 2 my grandma is sitting in / on /at the amchair on / next beside the fireplace 3 simom likes to say in / on / at bed all Sunday morning 4 we live on / in/ at an apartment on / at/ into a very road 5 I put my book in / on / over the table in / at / on the dining room 6 There is a clock under / next to / above the teacher*s desk 7 He always hides the key on / at / under the doormat 8 Mary is siting under / between / bihide her parents . They are watching tv 9 On a bus, passengers sit in front of / bihide / between the driver 10 You can see children*s books in / on / at the bookshelf to/ at / in the corner
Giải giúp mình bài toán này nhé,kẻ hình nữa
Kể tên các đới khí hậu của châu Á theo thứ tự từ Bắc xuống Nam
ai làm đúng và nhanh mik sẽ vote cho 5 sao
phân tích thành nhân tử 6x^2y-3xy-3xy^2
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