Question

let's find st and (s^2t^2) when s+t=12 and s-t=8​

Answer 1

Step-by-step explanation:

s+t =12

》s=12-t ......(1)

s-t=8

》12-t-t=8 ( put value of s from (1) )

》12-2t=8

》 2t=12-8

》2t=4

》t=2

from (1)

s=12-t

s=12-2=10

now, st= 10×2=20

s²t²= 100×4= 400