Toán Lớp 8: 1) x^2-6x+15
2) 4x^2+20x+13
3) x^2+y^2-2x+4y+35
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Toán Lớp 8: 1) x^2-6x+15
2) 4x^2+20x+13
3) x^2+y^2-2x+4y+35
Comments ( 1 )
nhưng theo mik là
=$y^{2}$ +4y+35
=(y+2)+ 31
2)Hằng đẳng thức số 1
3)Hằng đabgử thức số 1