Question

a) 4(x+y)

b) 10x(x+y)

Answer 1

a) 
= 4.(x + y)

= 4x + 4y
"""""""""""""""""""""""""""""""""""
b)
= 10x.(x + y)

= 10x² + 10xy

Answer 2

$\boxed{ a)\\ 4(x + y)= 4x + 4y } \\ \\ \boxed{b) \\ 10x(x + y) = 10x^2 + 10xy}$