Question

using suitable identity evaluate 50 square -40 square​

Answer 1

Step-by-step explanation:

a²-b² = (a+b)(a-b)

Here a= 50 and b= 40

So (50+40)(50-40)

90.10

900

Answer 2

Answer:

900

Step-by-step explanation:

50²-40²

using identity a²- b²=(a+b)(a-b)

=(50+40)(50-40)

=(90)(10)

=900