phan tich tu va mau thanh nhan tu roi rut gon
a, 3x^2-12x+12/x^4-8x
b,7x^2+14x+7/3x^2+3x
Những câu hỏi liên quan
1.Phan tich da thuc thanh nhan tu
A.(x^2-2x)(x^2-2x-1)-6
B.x^3-2x-1
2.Rut gon roi tinh gia tri bieu thuc khi x=2
1/x^2+x + 1/x^2+3x+2 + 1/x^2+5x+6 + 1/ x^2+7x+12
phan tich da thuc thanh nhan tu : a) 3x^2 - 22xy + 4x + 8y + 7x^2 + 1 ; b) 12x^2 + 5x - 12y^2 + 12y - 10xy - 3 ; c)x^4 + 6x^3 + 11x^2 + 6x + 1
phan tich da thuc thanh nhan tu
a, x^5+x-1
b, (x^2+3x+2)(x62+7x+12)-24
b ( x^2 + 3x + 2)( x^2 + 7x + 12) - 24
= [ x^2 +x + 2x + 2) ( x^2 +3x + 4x + 12) - 24
= [x(x+1) + 2 (x + 1) [x(x+3) + 4(x+3) ] - 24
= ( x + 1)(x+2) (x+3)(x+4) - 24
= ( x + 1).(x+4) (x+2)(x+3) - 24
=(x^2 + 5x + 4)(x^2+5x+6) - 24
Đặt x^2 + 5x +4 =y ta có:
= y(y+2) - 24
= y^2 + 2y - 24
= y^2 + 2y + 1 - 25
= ( y + 1)^2 - (5)^2
= ( y + 1 - 5 )( y + 1 + 5)
= ( y- 4)(y +6)
Thay y trở lại là đc
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phan tich cac da thuc sau thanh nhan tu theo mau:
2x^3-x
5x^2(x-1)-15x(x-1)
3x^2y^2+12x^2y-15x-y^2
3x(x-2y)+6y(2y-x)
phan tich cac da thuc sau thanh nhan tu theo mau:
a)\(2x^3-x\)
\(=x\left(2x^2-1\right)\)
\(=x\left(\left(\sqrt{2}x\right)^2-1^2\right)\)\
\(=x\left(\sqrt{2}x-1\right)\left(\sqrt{2}x+1\right)\)
b)\(5x^2\left(x-1\right)-15x\left(x-1\right)\)
\(=\left(5x^2-15x\right)\left(x-1\right)\)
\(=5x\left(x-3\right)\left(x-1\right)\)
d)\(3x\left(x-2y\right)+6y\left(2y-x\right)\)
\(=3x\left(x-2y\right)-6y\left(x-2y\right)\)
\(=\left(3x-6y\right)\left(x-2y\right)\)
\(=3\left(x-2y\right)\left(x-2y\right)\)
\(=3\left(x-2y\right)^2\)
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Phan tich thanh tu nhan tu
a)x^2-3x+2
b)8x^3-27+(x+1)×(3-2x)
Câu a :
\(x^2-3x+2\)
\(=x^2-x-2x+2\)
\(=\left(x^2-x\right)-\left(2x-2\right)\)
\(=x\left(x-1\right)-2\left(x-1\right)\)
\(=\left(x-1\right)\left(x-2\right)\)
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phan tich thanh nhan tu(bang ki nang tach hang tu)
1) 3x^2 +7x-6
2)6x^213x+6
3)8x^2+5x+3
1) 3x^2 +7x-6
=3x2-2x+9x-6
=x.(3x-2)+3.(3x-2)
=(3x-2)(x+3)
2)6x^213x+6
đề khùng
3)8x^2+5x+3
8x2-3x+8x+3
Đề khùng
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phan tich thanh nhan tu
a, -3x^2-12x-12
b, 4a^2-x^2-2x-1
c, 1-2m+m^2-x^2-4x-4
d, x^2(a+b)m-2xy(a-b)+ay^2-by^2
phan tich da thuc thanh nhan tu
3x^3 +12x^2 +12x
tu de bai suy ra: 3x(x^3+4x+4)=3x(x+2)^2
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Phan tich da thuc thanh nhan tu (x²+3x)^2+7x²+21x+10