Question

If a,b,c,d are in continuous proportion, prove that,
(a+d) (b+c)-(a+c)(b+d) is equall to (b-c)square ​

Answer 1

Answer:

ac+cd +ad

Step-by-step explanation:

(a+b)(b+c)-(a+c)(b+d)=(b-c)^2

a(b+c)+b(b+c)-a(b+d)+c(b+d)=(b-c)^2

ab+ac+b^2-bc-ab-ad+bc-cd =b^2-2(b)(c)+ c^2

b^2+ab-ab+bc+bc+ac+cd+ad=b^2-2bc+c^2

b^2+2bc+ac+cd+ad/b^2-2bc+c^2

ac+cd+ad ANS

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Answer 2

Answer:

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