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Ratling [72]
2 years ago
15

Which expression is equivalent to this polynomial? 9x² +4 OA. (3x+21)(3x-21) OB. (3x+2)(3x - 2) OC. (3x+21)² OD. (3x + 2)²​

Mathematics
1 answer:
andriy [413]2 years ago
5 0

Answer:

None of these

Step-by-step explanation:

None of this expressions are equivalent. But if the original polynomial is 9x^2-4, then answer would be (3x+2)(3x-2).

Using formula (a+b)(a-b)=a^2-b^2 , it follows:

(3x+2)(3x-2)=(3x)^2-2^2=9x^2-4

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Goshia [24]

Answer:

0.189

4.525

Step-by-step explanation:

v/1 + 2/v + 4v/3 = 11

we can eliminate denominators if we distribute 3v to each term:

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factor this trinomial:

there are no factors of 6 that would add to -33 so we can use the quadratic formula to solve:  (-b ± √b²-4ac) / 2a

a = 7

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(33 ± √1089 - 168) / 14

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(33 ± 30.35) / 14

(33+30.35) / 14 =  4.525

(33-30.35) / 14 =  0.189

3 0
3 years ago
At the beach, Pancho and his sister both built sandcastles and then measured their heights. Pancho's sandcastle was 3/5 of a foo
iVinArrow [24]

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4 years ago
Helpppp <br> I need like a full explanation
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Answer:

okay so the lines on the side of the triangle show that sides AB and AC are congruent so angle C would also be 40 degrees. angle A on the other hand would be 90*

Step-by-step explanation:


4 0
4 years ago
Plz help due tomorrow
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Answer:

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Step-by-step explanation:

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3 years ago
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