Question

If p = 3,q = -2 and r = -1, find the value of :

2p² + 3q - r² + 2pr - 5pqr.​

Answer 1

Step-by-step explanation:

2(3)² + 3(-2) - (-1)² + 2(3)(-1) - 5(3)(-2)(-1)

= 2x9 + 3x-2 -1 + (-6) -30

= 18+ (-7) + 180

= 11 + 180

= 191

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Answer 2

Answer:

-25

Step-by-step explanation:

2p^2+3q-r^2+2pr-5pqr

{2*(3)^2}+(3*-2)-{(-1)^2}+(2*3*-1)-(5*3*-2*-1)

(2*9)+(-6)-(1)+(-6)-(30)

18-6-1-6-30

-25