Expand the following, using suitable identities. (x + 3)(x + 7) - Vidyadip

Question

Expand the following, using suitable identities. $(x + 3)(x + 7)$

✓

Answer

$(x + 3)(x + 7)$
$= x^2+ (3 + 7)x + 3 × 7$
$= x^2+ 10x + 21$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Algebraic Expressions, Identities and Factorisation→Algebraic Expressions, Identities and Factorisation — all question types→MATHS STD 8 question papers→Gujarat Board STD 8 question papers→Gujarat Board question paper generator→

Similar questions

Factorise the following using the identity $a^2- b^2= (a + b)(a - b).$
$ y^4-625 $

Factorize of the following expressions:
$x a^2+x b^2-y a^2-y b^2$

Simplify: $\left(\frac{5}{8}\right)^{-7} \times\left(\frac{8}{5}\right)^{-5}$

$\Big(\frac{25}{5}\times\frac{2}{5}\Big)-\Big(\frac{3}{5}\times\frac{-10}{9}\Big)$

Rain forests are home to $90,000$ of the $2,50,000$ identified plant species in the world. What per cent of the world’s identified plant species are found in rain forests?

A mason has made a concrete slab. He needs it to be rectangular. In what different ways can he make sure that it is rectangular?

A coolie deposite $Rs. 150$ per month in his post office saving Bank account. If this is $15\%$ of his monthly income, find his monthly income.

A machinery worth ₹ 10500 depreciated by 5%. Find Its value after one year.

A trader marks his goods at $30\%$ above cost price and allows a discount of $10\%$. What is his gain percent$?$

Find the following products: $\frac{-13}{5}\times(-10)$