Question

Q.28. Subtract :
2a(a+b+c)-b(a-b+c) from 4c(-a +b+c)​

Answer 1

Step-by-step explanation:

4c(-a+b+c) - [2a(a+b+c)-b(a-b+c)]

=-4ac+4bc+4c^2 - (2a^2+2ab+2ac-ab+b^2-bc)

=-4ac+4bc+4c^2 - 2a^2-2ab-2ac+ab-b^2+bc

= -2a^2-b^2+4c^2-ab+5bc-6bc