Question

evaluate: (205)²- (195)²​

Answer 1

Answer:

4000

Step-by-step explanation:

205²=42025

195²=38025

So now subtract

42025-38025=4000

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Answer 2

Answer:

4000

Step-by-step explanation:

(205-195)(205+195) using A²-B²=(A-B)(A+B)

=10×400=4000