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Anit [1.1K]
3 years ago
14

Solve by completing the square: 2) 3x2 + 24x - 27 = 0

Mathematics
1 answer:
Anna71 [15]3 years ago
8 0
X = 1
Or
X= - 9
Sorry if it’s wrong first time doing this!
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Omar grouped the terms and factored the GCF out of the groups of the polynomial 3x3 – 15x2 – 4x + 20. His work is shown.
Phoenix [80]

Answer:

2nd option

Step-by-step explanation:

Given

3x³ - 15x² - 4x + 20

step 1 ( group the first/second and third/fourth terms )

(3x³ - 15x² ) + (- 4x + 20)

step  2 ( factor each group )

3x² (x - 5) - 4(x - 5) ← note factor of - 4 ( not + 4 )

step 3 ( factor out (x - 5) from each term )

(x - 5)(3x² - 4)

4 0
2 years ago
Read 2 more answers
I am not sure how sigma notation works, can somebody explain how to solve this? It isn't the second choice.
Masja [62]

Answer:

first answer is correct

Step-by-step explanation:

Hello, we want to write 2 + 4 + 6 + ... + 20

for n = 1, 2n = 2*1 =2

for n = 2, 2n = 2*2=4

for n = 3, 2n=2*3=6

etc

so

\displaystyle \sum_{n=1}^{10} {2n} = 2*1 + 2*2 +2*3+2*4+...+2*10=2+4+6+8+...+20

thanks

6 0
2 years ago
3√75<br> simplest rationalizing factor <br> PLEASE DO ANSWER ONLY IF YOU KNOW IT
rjkz [21]

Answer:

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Hope This Helps!!!

4 0
2 years ago
Joseph earns $15 for every lawn he mows in the amount of money he earns proportional to the number of long as he mows make a tab
ExtremeBDS [4]

Answer:

15x = y

Step-by-step explanation:


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3 years ago
Find the value of d.
Elena-2011 [213]

I’m pretty sure the answer is 16, I’m very sorry if this is incorrect.

5 0
2 years ago
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