Question

simplify the expressions and find their values of p=1,q=1,r=2 a. 5p^2 - 6q^2 - 7r^2 + 5q^2 +2r^2​

Answer 1

Answer:

-27+9

Step-by-step explanation:

5p2-6p2-7r2=6p2-5q2+2r2

5(1)2-6(1)2-7(2)2+6(1)2-5(1)2+2(2)2

5-6-7(4)+6-5+2(4)

1-28++8

-27+9