Question

4. If p= -2,q= –1 and r= 3, find the value of:
(a) p²+q2 - r²
(b) 2p²– q² + 3r²
(d) p²+q³+ pqr (e) 3p²q + 5 pq² + 2 pqr
(c) p –q-r
(f) p⁴ +q⁴ -r⁴
4
- r​

Answer 1

Step-by-step explanation:

a)4+1+9=14

b)2×4-1+3×9

=8-1+27

=34

c)-2-(-1)-3

= -2+1-3

= -4

d)4-1+6

=9

e)3×4×-1+5×-2×1 +2×6

= -12 -10+12

= -10

f)16+1-81

=64