Question

find the numerical value

$( - x + 5) ^{2} - 2x \: when \: x = - 1$
​

Answer 1

Answer:

answer

Step-by-step explanation:

( -x + 5 )² -2

a²+2ab+b²

(-x)² + 2(-x)(5) + 5²

x + ( -10 ) + 25

x - 10 + 25 + 2x

now put x= -1

-1 ( -10 ) + 25 - 2( -1 )

11 + 25 + 3

39

so here 39 is the answer

Answer 2

$= ( { - x + 5)}^{2} - 2x$

$x = - 1$

$= ( - 1 + 5) ^{2} - 2( - 1)$

$= ( {4)}^{2} + 2$

$= 16 + 2$

$= 18$