1 is b and it would be 164
The scale factor of 4 was applied to the first triangle. 6 was divided by 4 to get 1.5
ANSWER

EXPLANATION
From the Pascal's triangle,
The coefficients are :
1, 5, 10,10, 5,1
Because of the negative sign, the expansion will alternate sign.

We now put y=5 into the expansion to get,


I’m assuming the 3 and 4 are exponents??
The answer is
2.1708 x 10^7