Activity 2: Find in column B the values of the algebraic expressions listed in column
A if x = 5. Write the letter of your answer on the space provided. 2 points for
correct answer and I point for wrong answer.
A if x = 5. Write the letter of your answer on the space provided. 2 points for
correct answer and I point for wrong answer.
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Answer:
x = 5
1. x² - 2
(5)² - 2
25 - 2
= 23 (F)
2. 2(x² - 3x)
2((5)² - 3(5))
2(25 - 15)
2(10)
= 20 (I)
3. x² - 2x + 4
(5)² - 2(5) + 4
25 - 10 + 4
15 + 4
= 19 (A)
4. x² + 3x
(5)² + 3(5)
25 + 15
= 40 (G)
5. 3x² - 4x
3(5)² - 4(5)
3(25) - 20
75 - 20
= 55 (B)
6. 5x + 6
5(5) + 6
25 + 6
= 31 (E)
7. 3x/5
3(5) /5
15/5
= 3 (H)
8. x² - 32
(5)² - 32
25 - 32
= -7 (C)
9. 2x² + 3x
2(5)² + 3(5)
2(25) + 15
50 + 15
= 65 (J)
10. 2(x² - x) - 5
2((5)² - 5) - 5
2(25 - 5) - 5
2(20) - 5
40 - 5
= 35 (D)