Question

-4s² t²+5st+8s²t²-4st(s=-1,t=-2)​

Answer 1

Answer:

18

Given that ;

-4s² t² + 5st + 8s²t² - 4st

Values :

• s = -1
• t = -2

Substitute the values of s & t ;

-4 ( -1 )²( -2 )² + 5 ( -1 )( -2 ) + 8 ( -1 )²( -2 )²

-4 ( -1 )( -2 )

- 4 ( 4 ) + 5 ( 2 ) + 8 ( 4 ) - 4 ( 2 )

- 16 + 10 + 32 - 8

-6 + 32 - 8

26 - 8

= 18