Evaluate each of the following
algebraic expressions if x = -1 , y = 2, z = -2
(i) 2x² - y²
(ii) 2xy² - 3yz + xz²
(iii) x³ + y² + z ÷ 3
(iv) 2x + 3y - 3/2 × z
(v) 5 + 4x³ - 2z²
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- Answer :1 = 2(-1)^2-(2)^2 2-4= -2
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