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3 years ago

Multiply (x-2) (2x+4)

Mathematics

1 answer:

Bas_tet [7]3 years ago

5 0

Answer:

$2x {}^{2} - 8 = 0$

Step-by-step explanation:

$(x-2) (2x+4) = 0\\ 2x {}^{2} + 4x - 4x - 8 = 0 \\ 2x {}^{2} - 8 = 0$

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Given :

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To Find :

The area of the region between two concentric circular paths.

Solution :

Area of the outer circle :

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$\: \qquad \dashrightarrow \sf{{ \pi \: \times {(210)}^{2} {m}^{2}}}$

$\: \qquad \dashrightarrow \sf{{ \ \dfrac{22}{7} \times \:210 \times 210 \: {m}^{2}}}$

$\: \qquad \dashrightarrow \sf{{ \ \dfrac{22}{ \cancel{7}} \times \cancel{210} \times 210 \: {m}^{2}}}$

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Therefore,

Area of the region inside the circular paths :

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$\: \qquad \dashrightarrow \bf{{ \ 616000 \: {m}^{2}}}$

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