Question

Find the value of expression for .
a =1 , b = -3
a2
+2ab -b2
= ________

Answer 1

Answer:

The value of the expression is -14.

Step-by-step explanation:

Given the values of the variables,

$a=1\\b=-3$

and the expression,

$a^2+2ab-b^2$

The value of the expression for the given values is obtained by substituting those values in the expression. That is

$a^2+2ab-b^2 =1^2+2\times 1\times (-3)-(-3)^2\\\\=1-6-9 = -14$

So the value of the expression is -14.