X2 + b +12
If b is -7, the expression is unfactorable?
true or false

The answer is:  "False" ;  

                since the expression IS, in fact, "factorable."

Step-by-step explanation:

x² + (-7) + 12 =

x² - 7 + 12 ;  

What factors of "12" (that is: "+12") ;

add up to "-7" ?      -4, -3 ;   -4 * -3 = +12 ;

                                              -4 + (-3) = -4 - 3 = -7 ;

So, we can factor the expression:  (x - 4) (x -3) ;  

The answer is: "False" ; since the expression IS, in fact, "factorable."

f is the midpoint of

answer is (b.

164 ft2)

a base  

18

b base  

7

h height  

8