Toán Lớp 8: kết quả phép tính: 4x + 3 / x -2 – 9 + x / x-2
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Toán Lớp 8: kết quả phép tính: 4x + 3 / x -2 – 9 + x / x-2
Comments ( 2 )
Hok tốt!!!
Giải đáp:
[4x + 3]/[x -2] – [9 + x]/[x-2]
= [4x + 3 – 9 – x]/[x – 2]
= [(4x – x) + (3 – 9)]/[x – 2]
= [3x – 6]/[x – 2]
= [3.(x – 2)]/[x – 2]
= 3
#dariana