Question

using identity find the value of 10.5*9.5 please with explaination​

Answer 1

Step-by-step explanation:

(10.5) * (9.5)

= (10+0.5) * (10-0.5)                      

Using identity (a+b)*(a-b) = a²-b²

(10)² - (0.5)²    -----------------------------(a = 10, b = 0.5)

100 - 0.25

= 99.75

99.75 is the answer using identity

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