MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Factorisation Using Algebraic Identities

Question 85 x...

Question

Question 85 (xiv)

Expand the following, using suitable identities.

$(7 x + 5)^{2}$

Open in App

Solution

We have,
$(7 x + 5)^{2} = (7 x)^{2} + 5^{2} + 2 \times 7 x \times 5 = 49 x^{2} + 25 + 70 x$
[using the identity, $(a + b)^{2} = a^{2} + b^{2} + 2 a b$ ]

Suggest Corrections

thumbs-up

1

Similar questions

Question 85 (xiv)

Expand the following, using suitable identities.

$(7 x + 5)^{2}$

Question 85 (vii)

Expand the following, using suitable identities.

$(2 x + 9) (2 x - 7)$

Question 85 (v)

Expand the following, using suitable identities.

${(\frac{4}{5} p + \frac{5}{3} q)}^{2}$

Question 85 (x)

Expand the following, using suitable identities.

$(2 x - 5 y) (2 x - 5 y)$

Question 85 (i)

Expand the following, using suitable identities.

$(x y + y z)^{2}$

View More

Join BYJU'S Learning Program

explore_more_icon

Explore more

Factorisation Using Algebraic Identities

Standard VIII Mathematics

Join BYJU'S Learning Program

CrossIcon