Câu hỏi của Phúc Hồng Ân

Question

Phân tích đa thức thành nhân tửa) 49-x2-y2+2xyb)(x-3)+2x(3-x)2

Lấp La Lấp Lánh · Accepted Answer

a) $49-x^2-y^2+2xy=49-\left(x^2-2xy+y^2\right)=49-\left(x-y\right)^2=\left(7-x+y\right)\left(7+x-y\right)$b) $\left(x-3\right)+2x\left(3-x\right)^2=\left(x-3\right)+2x\left(x-3\right)^2=\left(x-3\right)\left[1+2x\left(x-3\right)\right]=\left(x-3\right)\left(2x^2-6x+1\right)$Câu trả lời: a) $49-x^2-y^2+2xy=49-\left(x^2-2xy+y^2\right)=49-\left(x-y\right)^2=\left(7-x+y\right)\left(7+x-y\right)$b) $\left(x-3\right)+2x\left(3-x\right)^2=\left(x-3\right)+2x\left(x-3\right)^2=\left(x-3\right)\left[1+2x\left(x-3\right)\right]=\left(x-3\right)\left(2x^2-6x+1\right)$

Minh Hiếu · Answer

a) $49-x^2-y^2+2xy$$=49-\left(x^2-2xy+y^2\right)$$49-\left(x-y\right)^2$Câu trả lời: a) $49-x^2-y^2+2xy$$=49-\left(x^2-2xy+y^2\right)$$49-\left(x-y\right)^2$

Trần Diệu Linh · Answer

a)$49-x^2-y^2+2xy\
=49-\left(x^2-2xy+y^2\right)\
=49-\left(x-y\right)^2\
=\left(7-x+y\right)\left(7+x-y\right)$  Câu trả lời: a)$49-x^2-y^2+2xy\
=49-\left(x^2-2xy+y^2\right)\
=49-\left(x-y\right)^2\
=\left(7-x+y\right)\left(7+x-y\right)$

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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