i have two questions i need help with.

for the first one should i use pascals triangle?

1. Expand, fully, each of the following

i) (x+ 2y)^4

2. Show that, ifxis small enough forx^2 and higher powers ofxto be neglected, the function (x– 2)(1 + 3x)^8 has a linear approximation of - 2 – 47x.