Toán Lớp 8: thu gon bieu thuc 2x-3(x+2)-2(x+1)^2
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Toán Lớp 8: thu gon bieu thuc 2x-3(x+2)-2(x+1)^2
Comments ( 2 )
= 2x – 3x – 6 – 2(x² + 2x + 1)
= 2x – 3x – 6 – 2x² – 4x – 2
= (2x – 3x – 4x) – (6 + 2) – 2x²
= – 5x – 8 – 2x²
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