evaluate the following products without multiplying directly (use identities)......
1. (98)(104)
2. (94)(103)
3. (1005)(995)
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evaluate the following products without multiplying directly (use identities)......
1. (98)(104)
2. (94)(103)
3. (1005)(995)
Plzzzzzzz answer fast..........
First answer will be marked as brainliest......
Plzzzzzzz follow me
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100 + 3) (100 + 7)
Now, by using identity
(x + a) (x + b) = x² + (a+b)*x + ab
So,
x = 100 , a = 3 , b = 7
= (100)² + (3+7)*100 + (3*7)
= 10000 + 1000 + 21
= 11021
.
(110 - 7) (110 - 3)
by using identity
(x + a) (x + b) = x² + (a+b)*x + ab
So,
x = 100 , a = (-7) , b = (-3)
= (110)² + { (-7) + (-3) }*110 + {(-7)*(-3)}
= 12100 + (-10)*110 + 21
= 21200 - 1100 + 21
= 11021