what is the value of expression 2 y square -x-3x cube for x =-2 Y = 2 and Z = -1
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2(2)^2 - (-2- 3 (-2))^3
= 2×4 - (-5×-8)
= 8 - 40
= -32
= 2×4 - (-5×-8)
= 8 - 40
= -32
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