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Oksi-84 [34.3K]
3 years ago
12

(a+b)²-4ab=please help me for my exam​

Mathematics
1 answer:
Colt1911 [192]3 years ago
8 0

Answer:

\huge \boxed{ \boxed{(a  -  {b)}^{2} } }

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • algebra
<h3>tips and formulas:</h3>
  • algebraic identity:(a-b)²=(a+b)²-4ab
<h3>let's solve:</h3>

therefore

using the identity our answer is (a-b)²

let's prove it

  1. (a-b)²:a²-2ab+b²
  2. rewrite -2ab as 2ab-4ab:a²+b²+2ab-4ab
  3. use (a+b)²=a²+2ab+c²:(a+b)²-4ab

therefore

we have also proven that

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