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2 years ago

10

(x+2) (x-2)=? (n+m) (n-m)=? (r+9) ( r-9)=?

1 answer:

asambeis [7]2 years ago

8 0

Answer:

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

(n+m) (n-m)= $n^{2} -m^{2}$

(r+9) ( r-9)= $r^{2}$ -81

Step-by-step explanation:

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Simplify EXPLAIN your answer.

krek1111 [17]

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$\frac{(x-5)(x-3)+2( x^{2} -3x+9)}{(x+3)(x-3)( x^{2} -3x+9)} = \frac{ x^{2} -8x+15+2x^{2} -6x+18}{(x+3)(x-3)( x^{2} -3x+9)} \\ \\ \frac{ 3x^{2} -14x+33}{(x+3)(x-3)( x^{2} -3x+9)}$

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3 years ago

Help me please!!!

34kurt

Step-by-step explanation:

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3 0

2 years ago

Evaluate square root of 4/9

Sergio039 [100]

Answer:

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Step-by-step explanation:

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3 years ago

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Amiraneli [1.4K]

Answer:

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Step-by-step explanation:

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answer

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3 years ago

Find the perimeter RST. Round answer to the nearest tenth<br> Show all the work

kow [346]

Answer:

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Step-by-step explanation:

Imagine a right-angled triangle with RS as hypotenuse. The base would be 3 units and the height would be 6 units. By Pythagorus:

RS²=3²+6²

RS= $\sqrt{45}$ ≈6.7 units

Imagine a right-angled triangle with RT as hypotenuse. The base would be 9 units and the height would be 12 units. By Pythagorus:

RT²=9²+12²

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TS²=12²+6²

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6 0

3 years ago