Question

If p= -2,q= -1 and r = 3, find the value of
1. 3p²q+5pq²+2pqr
2.p⁴+q⁴-r⁴ ​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

p = -2

q = -1

r = 3

1. 3p²q+5pq²+2pqr

⇒ $3(-2)^{2}$ × -1 + 5 × -2 × $(-1)^{2}$ + 2 × -2 × -1 × 3

⇒ 3 × 4 × -1 + 5 × -2 × 1 + 2 × -2 × -1 × 3

⇒ -12 + ( - 10 ) + 12

⇒ -12 - 10 + 12

⇒ -10

2.p⁴+q⁴-r⁴

⇒ $(-2)^{4} + (-1)^{4} - (3)^{4}$

⇒ 16 + 1 - 81

⇒ -64

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