Question

By using a suitable identity evaluate the 104 multiply 95

Answer 1

104×95=(100+4)×(100-5)
using (x+a) (x+b) put x=100,a=4,b=-5
104×95 =100^2+100(4-5)+(4)(-5)
=10000-100-20
=9880

Answer 2

Answer:

9880

Step-by-step explanation:

104 × 95 = ( 100 + 4 ) (100 - 5)

Using (x + a) (x + b) = x² + (a + b)x + ab, where x = 100, a = 4 and b = (-5)

             = 100² + (4 - 5)×100 + (4) × (-5)

             = 10000 -100 - 20

             = 9880

∴ 104 × 95 = 9880