Respuesta :

Answer:

8(x-6) at x=-1  is -56     &   2a² - 2a - 15 at a =13  is 297

Step-by-step explanation:

sub x = -1 into 8(x-6) which becomes 8(-1-6) which is equal to 8 x -7 = -56

Sub a = 13 into 2a²-2a-15 =  2(13²)  - 2(13) - 15  =  338 - 26 - 15 = 297

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