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If the value of polynomial (2mx & # 178; - X & # 178; = 5x + 8) - (5x & # 178; - 3Y = 5x) has nothing to do with the value of X, find the value of M & # 179; - (2m & # 178; - (5m-4) + m)
If the value of polynomial (2mx & # 178; - X & # 178; + 5x + 8) - (5x & # 178; - 3Y + 5x) has nothing to do with the value of X, find the value of M & # 179; - (2m & # 178; - (5m-4) + m (2mx ^ 2-x ^ 2 + 5x + 8) - (5x ^ 2-3y + 5x)
=2mx^2-x^2+5x+8-5x^2+3y-5x
=2mx^2-6x^2+8+3y
=The value of 2 (M-3) x ^ 2 + 3Y + 8 polynomial has nothing to do with the value of X, so M-3 = 0, M = 3
m^3-[2m^2-（5m-4)+m]
=m^3-(2m^2-5m+4+m)
=m^3-2m^2+5m-4-m
=m^3-2m^2+4m-4
=3^3-2x3^2+4x3-4
=17
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