Evaluate the following algebraic expressions when x=2, y=3, z=4
1. x + 2y
2.3x - y + z
3.x² + 2y²
4. 2x² - 3z
5. x + y - z
6. y - 2z
7. y² + z²
8. x² + y² + z²
9. 2x - 3y + 4z
10.3x² + 2y² - 4z
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1. x + 2y
2.3x - y + z
3.x² + 2y²
4. 2x² - 3z
5. x + y - z
6. y - 2z
7. y² + z²
8. x² + y² + z²
9. 2x - 3y + 4z
10.3x² + 2y² - 4z
Show your solution.
Need ko now :3
Answers & Comments
Verified answer
Answer:
1. 8
2. 7
3. 15
4. -4
5. 1
6. -5
7. 25
8. 29
9. 11
10. 14
Step-by-step explanation:
Substitute the value of x, y, and z in the problem.
1. x + 2y
= 2 + 2(3)
= 8
2.3x - y + z
= 3(2) - 3 + 4
= 6 - 3 + 4
= 3 + 4
= 7
3.x² + 2y²
= (2)²+ 2(3)²
= 4 + 2(9)
= 4 + 11
= 15
4. 2x² - 3z
= 2(2)²-3(4)
=2(4) - 12
=8 - 12
= -4
5. x + y - z
= 2 + 3 - 4
= 5 - 4
= 1
6. y - 2z
= 3 - 2(4)
= 3 - 8
= -5
7. y² + z²
= (3)² + (4)²
= 9 + 16
= 25
8. x² + y² + z²
= (2)² + (3)² + (4)²
= 4 + 9 + 16
= 29
9. 2x - 3y + 4z
= 2(2) - 3(3) + 4(4)
= 4 - 9 + 16
= - 5 + 16
= 11
10.3x² + 2y² - 4z
= 3(2)² + 2(3)² - 4(4)
= 3(4) + 2(9) - 16
= 12 +18 -16
= 30-16
=14