Question

8p2 + 8q2-5pq ( p=1,q=-1)​

Answer 1

Answer:

27

Step-by-step explanation:

8p2 = 8×1×2= 16

8q2 = 8×1×2=16

5pq= 5×1×1= 5

So the answer is one step away

Now we should add 16+16=32 and subtract 5 from it , So it will be 27

Answer 2

$8 {p}^{2} + 8 {q}^{2} - 5pq$

p = 1 , p = 2

$8(p) {}^{2} + 8(q) {}^{2} - 5(p)(q)$

$8(1) {}^{2} + 8( - 1) {}^{2} - 5(1)( - 1)$

${8}^{2} + - {8}^{2} -( - 5)$

$64 - ( - 64) - ( - 5)$

$128 - ( - 5)$

$133$