Question

2. Apply the identity (a + b) (a - b) = a? – bto find the
value of the following:
(i) 140^2 – 130^2
​

Answer 1

Answer:

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Answer 2

100.

Step-by-step explanation:

(a+b)(a-b)=(a-b)²

=>140²-13O²

=>(140-130)(140+130)

=>(140-130)²

=>140-130=10

=>(10)²

=>100.(Ans)