Question

iv) (la + mb): (lc + md) :: (la - mb): (lc -md)​

Answer 1

Step-by-step explanation:

la+mb+LC+MD/LC+md-la+MB=la-mb+lc-md/lc-md-la+MB

l(a+c)m(b+d)/l(a+c)m(b+d)=l(a+c)-m(b+d)/l(a+c)-m(d+b)

(l+m)(a+c)(b+d)/(l+m)(a+c)(b+d)=(l-c)(a+c)(b+d)/(l-c)(a+c)(d+b).

1=1