Question

4. Find the value of each of the following expressions when [p = -1, q = -2 , r = 3 , s = -2]
a) ( 2p + 2r)
b)( p – 3) ( s + r) c)(P + q) ( ^2+3)
d)(p^2+pq+q^2)(p-q)

Answer 1

Answer:

a)4

b)-4

c)Question is not clear

d)7

Step-by-step explanation:

a)(2p+2r)

= (2×-1)+(2×3)

= -2+6

=4

b) (p-3)(s+r)

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

=(-4)×1

=-4

C)It is not clear

d) (p^2+pq+q^2)(p-q)

=[(-1)^2+(-1)×(-2)+(-2)^2][(-1)-(-2)]

=(1+2+4)×1

=7×1

=7