what is her mother going to prepare for her bỉthdat party

there are three sticks of butter in the cupboard

i have enough food for the first three day of your stay

mn ơi  giúp em

Bài 3:

\(a,=3x\left(y-4x+6y^2\right)\\ b,=5xy\left(x^2-6x+9\right)=5xy\left(x-3\right)^2\\ d,=\left(x+y\right)\left(x-12\right)\\ f,=2x\left(x-y\right)\left(5x-4y\right)\\ g,=\left(x-2\right)\left(x-2+3x\right)=\left(x-2\right)\left(4x-2\right)=2\left(x-2\right)\left(2x-1\right)\\ h,=x^2\left(1-5x\right)+3xy\left(5x-1\right)=x\left(1-5x\right)\left(x-3y\right)\\ i,=x\left(x-2\right)+4\left(x-2\right)=\left(x+4\right)\left(x-2\right)\\ j,=x^2-2x-3x+6=\left(x-2\right)\left(x-3\right)\\ k,=4x^2-12x+3x-9=\left(x-3\right)\left(4x+3\right)\\ l,=\left(x+5\right)^2-y^2=\left(x-y+5\right)\left(x+y+5\right)\\ m,=x^2-\left(2y-6\right)^2=\left(x-2y+6\right)\left(x+2y-6\right)\\ n,=\left(x^2+5x+4\right)\left(x^2+5x+6\right)-24\\ =\left(x^2+5x+5\right)^2-1-24\\ =\left(x^2+5x+5\right)^2-25\\ =\left(x^2+5x\right)\left(x^2+5x+10\right)\\ =x\left(x+5\right)\left(x^2+5x+10\right)\)

Bài 3:

a)3xy-12x²+24xy²=3x(y-4x+8y²)

b)5x³y-30x²y+45xy=5xy(x²-6x+9)=5xy(x-6x+3²)=5xy(x-3)²

d)x(x+y)-12x-12y=x(x+y)-(12x+12y)=x(x+y)-12(x+y)=(x+y)(x-12)

f)10x²(x-y)-8xy(x-y)=(x-y)(10x²-8xy)

g)(x-2)³+3x²-6x=(x-2)³+(3x²-6x)=(x-2)³+3x(x-2)=(x-2)[(x-2)+3x]=(x-2)(x-2+3x)=(x-2)(4x-2)

h)x²+15x²y-3xy-5x³=(x²-3xy)+(15x²y-5x³)=x(x-3y)+5x²(3y-x)=x(x-3y)-5x²(x-3y)=(x-3y)(x-5x²)

i)x²-2x-8+4x=(x²-2x)+(4x-8)=x(x-2)+4(x-2)=(x-2)(x+4)

k)4x²-9x-9=4x²+3x-12x-9=(4x²+3x)-(12x+9)=x(4x+3)-3(4x+3)=(4x+3)(x-3)

l)x²-y²+10x+25=(x²+10x+25)-y²=(x²+10x+5²)-y²=(x+5)²-y²=[(x+5)+y][(x+5)-y]=(x+5+y)(x+5-y)

m)x²-4y²+24y-36=x²-(4y²-24y+36)=x²-[(2y)²-24y+6²]=x²-(2y-6)²=[x+(2y-6)][x-(2y-6)]=(x+2y-6)(x-2y+6)

n)(không biết làm)

introducing people:giới thiệu người.

         HỌC TỐT NHÉ!

@Lưu Thu Hương Cảm ơn bạnnnhưng mình cần bài mẫu cơ ạ!

bài mẫu nè,dùng hay không tuỳ bạn nhé!

    in my family, my favorite is my mother.My mother is a ferry driver.My mother is thirty year old. My mother is very gentle and friendly .Those who are in trouble ,she is always heplping put mom never looks down on others .My mother is a wonderful person .I love mom !

1, Nam isn't so short as Hưng

2,Lan drives to work

3,How many fans are there in the classroom ?

4,It took 15 minutes 

5,Unless she work hard ,giữ nguyên

giúp j vậy

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