Question

初一数学,因式分解,3题,好的加分

Answer 1

3.=x^2+x+1/4-y^2=(x-1/2)^2-y^2=(x+y-1/2)(x-y+1/2)

2.原式=x^2+6x+8+1=(x+3)^2

1.不太会