Question

If p= 2 and q = -1, then find the value of 14p2 -9pq-17

Answer 1

Correct Question:

If p = 2 and q = –1, then find the value of 14p^2 – 9pq – 17.

Given:

p = 2 and q = – 1

To find:

Value of 14p^2 – 9pq – 17

Solution:

Keeping value of p and q, we get

$14p {}^{2} - 9pq {}^{} - 17$

$= 14 \times 2 {}^{2} - 9 \times 2 \times - 1 - 17$

$= 56 + 18 - 17 \\ \\ = 74 - 17 \\ \\ = 57$

$= 14 \times 4 - 18 \times - 1 - 17$

$= 56 + 18 - 17$

Thus, value of $14p {}^{2} - 9pq - 17$is $57$