Question

Evaluate the following without multiplying directly 5.1 multiply 4.9

Answer 1

Answer:

The answer is -

24.99

Step-by-step explanation:

To evaluate the following without multiplying directly 5.1 X 4.9

As,

5.1 = 5 [or 5.0] + 0.1

And

4.9 = 5 [or 5.0] - 0.1

Now use the values

= 5.1 X 4.9

(5 + 0.1) = 5.1

(5 - 0.1) = 4.9

So,

= 5.1 X 4.9

= (5 + 0.1)(5 - 0.1)

Follow the identity

= $(5)^{2}$ - $(0.1)^{2}$ [Using identity $a^{2}$ - $b^{2}$ = (a + b)(a - b); here (a + b)(a - b) = (5 + 0.1)(5 - 0.1)]

= 25 - 0.01

= 24.99

HOPE THE ANSWER WILL BE GREAT PATH OF LEARNING, MATE

HAVE A NICE DAY

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BE SAFE

Answer 2

Answer:

Answer is 24.99

Step-by-step explanation:

Have a Good Day