Question

phan tích da thức thanh nhan tu

a) 2a(x+y)+y+x

b) 2(x-y)^2-x+y

c) x^2-xy-3x+3y

d) ax^2+6x^2-6x-ax+a+b

2) phan tich da thuc thanh nhan tu ( nhieu phuong phap)

a) 5a^2+20a+20                              c) 25-x^2+2xy-y^2

b) 5a^2-10ab+5b^2                           d) m^2+2mn+n^2-p^2    

Answer 1

a) 2a(x+y)+y+x = 2a(x+y)+(x+y)

                       = (2a+1)(x+y)

Answer 2

b) 2(x-y)^2-x+y = \(2\left(x-y\right)^2-\left(x-y\right)=\left(2x-2y-1\right)\left(x-y\right)\)

Answer 3

nhờ lm hết cái

Answer 4

c) x^2-xy-3x+3y = x(x-y) - 3(x-y)

                        = (x-3)(x-y)

d) ax^2+6x^2-6x-ax+a+b=\(ax\left(x-1\right)+6x\left(x-1\right)+\left(a+b\right)=x\left(a+b\right)\left(x-1\right)+\left(a+b\right)=\left(a+b\right)\left(x^2-x-1\right)\)

Answer 5

bbai 2 bn kia