Multiply the surds 7 42 - Vidyadip

Question

Multiply the surds $\sqrt{7} \times \sqrt{42}$

✓

Answer

$\sqrt{7} \times \sqrt{42}=\sqrt{7 \times 42}=\sqrt{7 \times 7 \times 6}=7 \sqrt{6}$
( $7 \sqrt{6}$ is an irrational number.)

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 "1 Mark Question" from Real Numbers→Real Numbers — all question types→Maths STD 9 question papers→Maharashtra Board STD 9 question papers→Maharashtra Board question paper generator→

Similar questions

Factorize: $3 x^2+7 x+2$

Find total surface area of a cone, if its base radius is 12 cm and height is 16 cm. (p = 3.14)

Rationalise the denominator of the following:$\frac{1}{\sqrt{7}}$

Simplify $\big(2\sqrt{5}+3\sqrt{2}\big)^2.$

Give the equations of two lines passing through (3, 12) How many more such lines are there, and why?

Simplify the following:
$\left(2 x^{-2} y^3\right)^3$

For the following points, write the quadrant in which it lies.
(-6, 3)

Which of the following expressions are polynomials? In case of a polynomial, write its degree.$\text{t}^2-\frac{2}{5}\text{t}+\sqrt{5}$

Find the zero of the polynomial:
r(x) = 2x + 5

State whether the given algebraic expressions are polynomials? Justify : $2 m^{-2}+7 m-5$