391×409 what is the different of this square?
Answers
Answered by
5
391×409
=(400-9)(400+9)
=400^2-9^2
=160000-81
=159919
so your answer is 159919
=(400-9)(400+9)
=400^2-9^2
=160000-81
=159919
so your answer is 159919
MyNameIsPrinceGupta:
You're wrong too bro
The correct answer is 159919 .
Answered by
5
391 * 409
=(400-9)*(400+9)
=(400)^2 - (9)^2
{ As (a-b)(a+b)=a^2-b^2 }
=160000 - 81
=159919
#Hope it helps you .
=(400-9)*(400+9)
=(400)^2 - (9)^2
{ As (a-b)(a+b)=a^2-b^2 }
=160000 - 81
=159919
#Hope it helps you .
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