Question 86 (xv)

Using suitable identities, evaluate the following:

$10.1 \times 10.2$

Open in App

Solution

We have,
$10.1 \times 10.2 = (10 + 0.1) (10 + 0.2) = (10)^{2} + (0.1 + 0.2) 10 + (0.1) (0.2) = 100 + 0.3 \times 10 + 0.02$
$= 103.02$ [using the identity, $(x + a) (x + b) = x^{2} + (a + b) x + a b$ ]

Suggest Corrections

Similar questions

Question 86 (xv)

Using suitable identities, evaluate the following:

$10.1 \times 10.2$

Question 86 (xiv)

Using suitable identities, evaluate the following:

$9.8 \times 10.2$

Question 86 (i)

Using suitable identities, evaluate the following:

$(52)^{2}$

Question 86 (ii)

Using suitable identities, evaluate the following:

$(49)^{2}$

Question 86 (iv)

Using suitable identities, evaluate the following:

$(98)^{2}$

Join BYJU'S Learning Program

Explore more

Join BYJU'S Learning Program