Question

7. If a = 2 and b = -1, find the values of the
following algebraic expressions.
(i) a²-b²
​

Answer 1

Answer:

a2−b2

Evaluate for a=2,b=−1

22−(−1)2

=3

Answer 2

if a =2and b = -1

a²-b²=2²-(-1)²

4+1 =5

so the answer of a²-b² =5