Toán Lớp 8: (x+3/x-2) + (x-3/x+2) – (2x^2+3x+6/x^2-4)
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Toán Lớp 8: (x+3/x-2) + (x-3/x+2) – (2x^2+3x+6/x^2-4)
ns kq hoi nhen :”>
Comments ( 1 )
={x+3}/{x-2}+{x-3}/{x+2}-{2x^2+3x+6}/{(x+2)(x-2)}
={(x+3)(x+2)}/{(x-2)(x+2)}+{(x-3)(x-2)}/{(x+2)(x-2)}-{2x^2+3x+6}/{(x+2)(x-2)}
={(x^2+x^2-2x^2)+(2x+3x-2x-3x-3x)+(6+6-6)}/{(x+2)(x-2)}
={-3x+6}/{(x+2)(x-2)}
={-3(x-2)}/{(x+2)(x-2)}
={-3}/{x+2}