Question

Find the value of expression if p = -1, q = 1.
(a) 2p3 - q3 + 1
(b) - 3p2-q2-1
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Answer 1

Answer:

Step-by-step explanation:

(i) 2p³ - q³ + 1

2(-1)³ - (1)³ + 1

2-1+1

= 2

(ii) -3p² - q² - 1

-3(-1)² - (1)² - 1

-3-1-1

= -5

Answer 2

Step-by-step explanation:

2p3 - q3 + 1

2(-1)3-(1)3+1

2-3-3+1

3-3

0

b) - 3p2-q2-1

-3(-1)2-(1)2-1

-3(1)-2-1

-3-3

-6