Răspuns:
-4√2x
Explicație pas cu pas:
x( √8- √18)+( √32-√50)x+( √72- √128)x=
=x·(√(4·2)-√(9·2))+(√(16·2)-√(25·2))·x+(√(36·2)-√(64·2))·x=
=x·(2√2-3√2)+(4√2-5√2)·x+(6√2-8√2)·x=x·(-1√2)+(-1√2)·x+(-2√2)·x=
=-1√2·x-1√2·x-2√2x=x·(-1√2-1√2-2√2)=x·(-4√2)=-4√2x.