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Thu gọn biểu thức : (x-5)(x+5)-(x+1)^2
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Thu gọn biểu thức : (x-5)(x+5)-(x+1)^2

User WillDonohoe
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(x-5)(x+5)-(x+1)^2\\=x^2 -25-(x^2+2x +1)\\=x^2 -25-x^2-2x -1\\=-2x-26

ANSWER: -2x -26

Ok done. Thank to me :3

User Wils
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