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navik [9.2K]
3 years ago
12

I need help on this question Factor by grouping. 2u^3+3u^2+14u+21

Mathematics
1 answer:
Andru [333]3 years ago
6 0
U^2(2u+3)+7(2u+3)

(u^2+7)(2u+3)
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Factor 125x3 + 343y3
Annette [7]

Answer:

(5x + 7y)(25x² - 35xy + 49y²)

Step-by-step explanation:

125x³ + 343y³ ← is a sum of cubes and factors in general as

a³ + b³ = (a + b)(a² - ab + b² )

125x³ = (5x)³ ⇒ a = 5x

343y³ = (7y)³ ⇒ b = 7y

125x³ + 343y³

= (5x + 7y)((5x)² - (5x × 7y) + (7y)²)

= (5x + 7y)(25x² - 35xy + 49y²) ← in factored form

5 0
3 years ago
Four times a difference of 17 and a number is 84.
hichkok12 [17]
4×17-x=84
68-x=84
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3 years ago
-2 + 3n< 28 and 6n - 7 > 17
sveta [45]

Answer:

N< 10 and N>4

Step-by-step explanation:

-2+3n< 28. =. 3n < 30. =. N < 10

+2. +2 ÷3. ÷3

6n - 7 > 17. =. 6n > 24. =. N > 4

+7. +7. ÷ 6. ÷ 6

8 0
4 years ago
What is the answer decimal division
Bezzdna [24]
Answer: 2.7

Step-by-Step Explanation:
7 0
3 years ago
The equation y + 3 = 5(x-3)
Dimas [21]

Answer:

Your answer is (0,-18)

Step-by-step explanation:

The Y Intercept is (0, -18) and the X Intercept is (18/5, 0)

6 0
2 years ago
Read 2 more answers
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