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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: rút gọn biểu thức 2x + 1)(4×2 – 2x + 1) – (x – 1)(8×2 – 1) 2.Tìm x, biết a)(3x – 1)(4x + 3) – (6x – 1)(2x – 3); b)9x 2 – (3x

Toán Lớp 8: rút gọn biểu thức 2x + 1)(4×2 – 2x + 1) – (x – 1)(8×2 – 1)
2.Tìm x, biết
a)(3x – 1)(4x + 3) – (6x – 1)(2x – 3); b)9x 2 – (3x + 7)(2x + 3) = 49

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    toan-lop-8-rut-gon-bieu-thuc-2-1-42-2-1-1-82-1-2-tim-biet-a-3-1-4-3-6-1-2-3-b-9-2-3

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222-9+11+12:2*14+14 = ? ( )