Apply the property of square to fine 49*51
Answers
Answered by
2
(50-1)(50+1). ...... third identity
Or
(50)²-1²
=2500-1
=2499
Or
(50)²-1²
=2500-1
=2499
Answered by
2
49*51
= (50-1)*(50+1)
= 50^2 - 1^2
{As (a+b)*(a-b) = a^2 - b^2}
= 2500 - 1
= 2499
= (50-1)*(50+1)
= 50^2 - 1^2
{As (a+b)*(a-b) = a^2 - b^2}
= 2500 - 1
= 2499
Similar questions