Question

Find the value of s-t, if s + t = 5 and st = 4​

Answer 1

Step-by-step explanation:

if S+t= 5

then S= 5-t

now, if s×t = 4

(5-t)×t= 4

5t-t²= 4

-t²+5t-4=0

t²-5t+4 = 0 (multiply by -1)

t²-4t-t+4=0

t(t-4) -1(t-4) =0

(t-4) (t-1) =0

if t -4 = 0

t= 4

if( t-1) = 0

t = 1

Now, if s = 5-t

then, s = 5-1, 5-4

S= 4,1

now s -t= 4-1 = 3

Answer 2

Answer:If s = 4 and t = 5 then,

what is the value of  

s + s + t + t

Step-by-step explanation:

If s = 4 and t = 5 then,

what is the value of  

s + s + t + t