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never [62]
3 years ago
11

Please help me :( I would Appreciate it

Mathematics
1 answer:
vova2212 [387]3 years ago
4 0

Answer:

I think the answer is C

Step-by-step explanation:

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hammer [34]

-20 is -10 × 2

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Subtract. <br> a. (21x)-(-16+7x) <br> b. (-13n)-(17-5n)<br> c.(4y-7)-(y-7)<br> d.(-w+0.4)-(-w-0.4)
ruslelena [56]

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Step-by-step explanation:

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Please help with #12 im confused<br> that is the key but i dont get it
Svetllana [295]

Given Equation

\boxed{ \tt \: (8 \sqrt{3}  - 2 \sqrt{2} )(8 \sqrt{3}   + 2 \sqrt{2})}

Step by step expansion:

\dashrightarrow \sf \: (8 \sqrt{3}  - 2 \sqrt{2} )(8 \sqrt{3}   + 2 \sqrt{2})

\\  \\

\dashrightarrow \sf \: (8 \sqrt{3})^{2}  - (2 \sqrt{2}  {)}^{2}

Reason:

(a + b)(a - b) = a²- b²

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\dashrightarrow \sf \: (8 {}^{2}  \times  { \sqrt{3} }^{2} )- (2 \sqrt{2}  {)}^{2}

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\dashrightarrow \sf \: (64  \times 3 ) - (2 \sqrt{2}  {)}^{2}

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\dashrightarrow \sf \: (64  \times 3 ) - (2 {}^{2} \times   \sqrt{2}  {}^{2}  {)}

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\dashrightarrow \sf \: 192- 8

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\dashrightarrow \sf \: 184

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~BrainlyVIP ♡

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Step-by-step explanation:

I think that is the right answer I hope ut helps

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