Question

làm hộ em bài 1 vs bài 2 thôi ạ

Answer 1

1)

a) 4y²-4xy+x²= x²-4xy+4y²= (x-2y)²

b) 9x²-12xy+4y²= (3x)²-2.3x.2y+(2y)²= (3x-2y)²

c) 16x²-25=(4x)²-5²= (4x-5)(4x+5)

d) 1-9y²= 1²-(3y)²=(1-3y)(1+3y)

 

Answer 2

g) x³-27y³= (x-3y)(x²+3xy+9y²)

h) 64 + 8x³=(4+2x)(16+8x+4x²)

Answer 3

i) x⁴+4y⁴-4x²y²= (x²)²-2x²2y²+(y²)²=(x²-y²)²