Question

if x= 1 and y= -2 and z= 3, find the values of each of the following algebraic expressions​

Answer 1

→️ If x = 1 and y = -2 and z = 3, find the values for each of the following algebraic expressions.

a) 2x³ + 3y³ + 4z³ - 7xyz

↪️ 2(1)³ + 3(-2)³ + 4(3)³ - 7(1)(-2)(3)

↪️ 2 + 3(-2)³ + 4(3)³ - 7(1)(-2)(3)

↪️ 2 + 3(-8) + 4(27) - 7(-2)(3)

↪️ 2 + 3(-8) + 4(27) - 7(-6)

↪️ 2 + (-24) + 108 - (-42)

↪️ 2 + (-24) + 108 + 42

↪️ 2 - 24 + 108 + 42

↪️ 2 - 24 + 150

↪️ 2 + 126

↪️ 128 is the solution

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b) 4xy⁴ - 19x²y + 8z

↪️ 4(1)(-2)⁴ - 19(1)²(-2) + 8(3)

↪️ 4(-2)⁴ - 19(-2) + 24

↪️ 4(16) - (-38) + 24

↪️ 64 + 38 + 24

↪️ 102 + 24

↪️ 126 is the solution

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c) 5x³y² - 19x²y² + 11z

↪️ 5(1)³(-2)² - 19(1)²(-2)² + 11(3)

↪️ 5(-2)² - 19(-2)² + 33

↪️ 5(4) - 19(4) + 33

↪️ 20 - 76 + 33

↪️ 20 - 43

↪️ -23 is the solution

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d) 7x³ + 3y² - 20xy² + 13z

↪️ 7(1)³ + 3(-2)² - 20(1)(-2)² + 13(3)

↪️ 7 + 3(4) - 20(4) + 39

↪️ 7 + 12 - 80 + 39

↪️ 19 - 80 + 39

↪️ 19 - 41

↪️ -22 is the solution $\:$

Answer 2

Answer:

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