(a+b)²-4ab=please help me for my exam
1 answer:
Answer:
Step-by-step explanation:
<h3>to understand this</h3><h3>you need to know about:</h3>- algebra
- algebraic identity:(a-b)²=(a+b)²-4ab
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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Answer:
1/4
Step-by-step explanation:
Slope of a line can be found if given two points by using the formula where
are points on the line.
However, I like to line up the points vertically and subtract then put 2nd difference over 1st difference.
Like this:
( 3 , 3 )
-( -1 , 2 )
---------------------
4 1
So the slope is 1/4.