Evalute: (405)^2-(395)^2 - Vidyadip

Question

Evalute:
$\left\{(405)^2-(395)^2\right\}$

✓

Answer

$\left\{(405)^2-(395)^2\right\}$
$(405)^2-(395)^2$
$=(405+395)(405-395)$
$\left\{\because a^2-b^2(a+b)(a-b)\right\}$
$=800 \times 10=8000$

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 Mark Question" from Factorisation→Factorisation — all question types→Maths STD 8 question papers→Maharashtra Board STD 8 question papers→Maharashtra Board question paper generator→

Similar questions

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

Find all possible values of y for which the number 53y1 is divisible by 3. Also, find each such number.

Expand:
$(5 x+11)^2$

Express the following in standard form:0.000027

Evaluate:
$\Bigg\{\Big(\frac{4}{3}\Big)^{-1}-\Big(\frac{1}{4}\Big)^{-1}\Bigg\}^{-1}$

Find the following products:
$\left(6 x^2-x+8\right) \times\left(x^2-3\right)$

Find product:
$\big(\frac{7}{9}\text{ab}^2\big)×\big(\frac{15}{7}\text{ac}^2\text{b}\big)×\big(\frac{−3}{5}\text{a}^2\text{c})$

Evaluate:$\sqrt{75.69}$

Solve:
$a^2-b^2+2 b c-c^2$

Factorize of the following expressions:
$a b\left(x^2+1\right)+x\left(a^2+b^2\right)$