Evaluate using suitable identity
(a) (93)square - (15)square
(b) 58×62
Answers
Answered by
10
a) (93+15) (93-15)
108×78
8424
108×78
8424
Answered by
9
a). 93² - 15²
➡ ( a+b ) ( a-b )
➡ ( 93+15 ) ( 93-15 )
➡ ( 108 ) ( 78 )
➡ 8424.
b).58 × 62
➡ ( a+b ) ( a-b ) = a² - b²
➡ ( 60 -2 ) ( 60 + 2 )
➡ 60² - 2²
➡ 3600 - 4
➡ 3596.
➡ ( a+b ) ( a-b )
➡ ( 93+15 ) ( 93-15 )
➡ ( 108 ) ( 78 )
➡ 8424.
b).58 × 62
➡ ( a+b ) ( a-b ) = a² - b²
➡ ( 60 -2 ) ( 60 + 2 )
➡ 60² - 2²
➡ 3600 - 4
➡ 3596.
Similar questions