Question

plz tell anyone fast ​

Answer 1

Step-by-step explanation:

ANSWER IS IN THE ATTACHMENT

MARK ME AS THE BRAINLIEST

Answer 2

Step-by-step explanation:

8*s^2*t^2-8*2*s^3*t = 8*s^2*t^2-16 *s^3*t

substitute s=1 and t=5,

8*1^2*5^2-16*1^3*5= 8*25-16*5= 200-80= 120