Question

The value of p- q +pq for p= -1, q=-2 is
(a) 0
(b) -1
(c) -5
(d) 3

Answer 1

-1-(-2)+-1×-2
-3+2
-1
may answer is correct

Answer 2

Given: p= -1, q=-2

To find: The value of p - q + pq

Solution:

• Now we have given the values of p and q, -1 and -2, so to find the value of

• p- q + pq we need to put value of p and q in the given equation.

                -1 - (-2) + (-1)(-2)

• Here, we need to take care of sign,

• So first clearing all the signs, we get:

                -1 +2 + (1)(2)

               (as (-)(-) = (+))

• So now further adding the sum, we get:

           - 1 +2 + 2

           -1 + 4

           = 3

Answer:

                 The value of p - q + pq is 3