Câu hỏi của Zero Two

Question

Phân tích các đa thức sau thành nhân tửa. 5ax - 15ay + 20ab. 6xy - 12x - 8yc. 3ab (x - y) + 3a(y - x)d. x2 - xy + 2x - 2ye. ax2 - 5x2 - ax + 5x + a - 5g. x2y - 4xy2 + 4y3 - 36yz2h. 4xy - x2 - 4y2 + m2...

Ngô Chi Lan · Accepted Answer

a) $5ax-15ay+20a$$=5a\left(x-3y+4\right)$b) $6xy-12x-8y$$=6\left(xy-2x-3y\right)$c) $3ab\left(x-y\right)+3a\left(y-x\right)$$=3a\left(x-y\right)\left(b-1\right)$d) $x^2-xy+2x-2y$$=\left(x+2\right)\left(x-y\right)$Câu trả lời: a) $5ax-15ay+20a$$=5a\left(x-3y+4\right)$b) $6xy-12x-8y$$=6\left(xy-2x-3y\right)$c) $3ab\left(x-y\right)+3a\left(y-x\right)$$=3a\left(x-y\right)\left(b-1\right)$d) $x^2-xy+2x-2y$$=\left(x+2\right)\left(x-y\right)$

Ngô Chi Lan · Answer

e) $ax^2-5x^2-ax+5x+a-5$$=\left(a-5\right)\left(x^2-x+1\right)$Câu trả lời: e) $ax^2-5x^2-ax+5x+a-5$$=\left(a-5\right)\left(x^2-x+1\right)$

a) 5x – 15y	b) 5x²y² + 15x²y + 30xy²
c) x³ – 2x²y + xy² – 9x	d) x(x² – 1) + 3(x² – 1)
e) x² – 10x + 25	g) x² – 64
h) (x + y)² – (x² – y²)	i) 5x² + 5xy – x – y
k) x² – 25 + y² + 2xy	l) 2xy – x² – y² + 16
m) (x – 2)(x – 3) + (x – 2) - 1	n) 3(x – 1) + 5x( 1 – x)
p) 12y(2x – 5) + 6xy(5 – 2x)	q) ax – 2x – a² + 2a

a) a² – b² – 2a + 1	b) x² – 2x – 4y² – 4y
c) x² + 4x – y² + 4	d) x⁴ – 1
e) x⁴ + x³ + x² + x	g) a² + 2ab + b² – ac - bc

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