Question

Formula of a+b-c-d = ​

Answer 1

Answer:

A+B-C-D = AB↑2 -CD↑2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

(a+b-c-d)^2

=[(a+b)—(c+d)]^2

=(a +b)^2–2(a+b)(c+d)+(c+d)^2..{using the formula (a--b)^2=a^2–2ab+b^2}

=(a^2+2ab+b^2)–2(ac+ad+bc+bd)+(c^2+2cd+d^2)..(using the formula for (a+b)^2=a^2+2ab+b^2 )

a^2+2ab+b^2–2ac—2ad—2bc—2bd+c^2+2cd +d^2

=a^2+b^2+c^2+d^2+2ab—2ac—2ad—2bc—2bd+2cd

=