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if x=-4 ,y= - 5 and z=2. what is the value of ...y-3x+z​

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Answer:

x3−2y2−3x3+z4 Arranging similar monomials =x3−3x3−2y2+z4 =−2x3−2y2+z4 =−2(3)3−2(5)2+(−3)4 =−2×27−2×25+81 =−54−50+81 =−104+81 =     −23

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