Question

17 x 8 = (10+7) x 8 17 x8 =(10x8)+ ()

Answer 1

17*8=(10+7)*8
Use the distributive property
17*8=(10*8)+(7*8)

You have to multiply the number outside the bracket with each of the numbers within it
Example 5(2+10)
Then (5*2)+(5*10)

Answer 2

17 x 8 = (10 +7) x 8 
17 x 8 = (10 x 8) + (8 x 7)