Question

____X (-8) = -64 I don't know​

Answer 1

Step-by-step explanation:

take the blank as a varible. Say 'a'

now take -8 to the other side which gives a equals 8

Answer 2

$\huge{ \boxed{ \Blue{Answer = +8}}}$

$\huge{ \boxed{ \purple{Step - by - step}}}$

$(+8 ) \ \times \ (-8) \ = -64$