Question

If (a + b + c + d) (a - b-c + d)
= (a + b-c-d) (a-b+c- d);
prove that: a: b = c : d.​

Answer 1

Step-by-step explanation:

(a + b + c + d) (a - b-c + d)

= (a + b-c-d) (a-b+c- d);

prove that: a: b = c : d.