Question

(a+b+c+d) (a-b-c+d) = (a + b-c-d)
(a-b+c-d).
show that a,b,C,d Ari in proportion​

Answer 1

Step-by-step explanation:

Let's simplify step-by-step.

a+b+c+d

There are no like terms.

Answer:

=a+b+c+d