Câu 1:
a: \(y^4+2y^3+y^2=y^2\left(y+1\right)^2\)
b: \(y^2+4y+3=\left(y+1\right)\left(y+3\right)\)
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Câu 1:
a: \(y^4+2y^3+y^2=y^2\left(y+1\right)^2\)
b: \(y^2+4y+3=\left(y+1\right)\left(y+3\right)\)