(a+b)²-4ab=please help me for my exam

Mathematics

1 answer:

Colt1911 [192]2 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

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

therefore

we have also proven that

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