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Product Law

4.2× 4.2-1.9×...

Question

$\frac{4.2 \times 4.2 - 1.9 \times 1.9}{2.3 \times 6.1}$ is equal to:

A

0.5

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B

1.0

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C

20

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D

22

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Solution

The correct option is C $1.0$
Given Expression can be written as $\frac{({4.2}^{2} - {1.9}^{2})}{(4.2 - 1.9) (4.2 + 1.9)} = \frac{({4.2}^{2} - {1.9}^{2})}{({4.2}^{2} - {1.9}^{2})} = 1$

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Similar questions

	A	A	B	B	C	C	D	D	E	E
	M	S	M	S	M	S	M	S	M	S
$2006$	$2.8$	$1.3$	$3.3$	$2.2$	$2.6$	$1.7$	$3.0$	$2.2$	$1.9$	$1.4$
$2007$	$3.2$	$2.0$	$2.4$	$1.6$	$2.2$	$1.5$	$2.5$	$1.9$	$2.0$	$1.7$
$2008$	$1.9$	$0.9$	$2.9$	$1.6$	$2.1$	$1.0$	$2.3$	$1.5$	$1.6$	$1.1$
$2009$	$1.0$	$0.4$	$2.4$	$1.3$	$2.8$	$1.4$	$2.1$	$1.2$	$3.2$	$2.5$
$2010$	$2.5$	$1.5$	$2.3$	$1.2$	$2.6$	$2.1$	$1.8$	$1.1$	$3.1$	$2.6$

What is the total number of units manufactured by company C over all the years together?

$(8 - 1 \frac{1}{2}) + 23 + (256 - 73) + 4.2 - \frac{1}{2} - (3.2 - 2.3)$ equals

Q. Young's modulus of steel is

1.9 \times 10^{11} {N/m}^{2}

. When expressed in

CGS

{dyne/cm}^{2}

, it will be equal to

Q. Calculate the value of

| - 3.1 | - | - 4.2 | + | 2.3 |

.

Estimate 1.9

Estimate 0.9458

Estimate 0.5

Estimate 0.93

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