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Katena32 [7]
3 years ago
8

- a(-4-5a) - 3a(2 + a) =

Mathematics
2 answers:
Masja [62]3 years ago
6 0

Answer:

a = 0 or a = 1

Step-by-step explanation:

-a(-4 - 5a) - 3a(2 + a) = 0

4a + 5a² - 6a - 3a² = 0

2a² - 2a = 0

2a(a - 1) = 0

2a = 0

a = 0

Or

a - 1 = 0

a - 1 + 1 = 0 + 1

a = 1

Note that a quadratic equation always has two solutions.

Lorico [155]3 years ago
4 0

Answer:

Let's simplify step-by-step.

(−a)(−4 − 5a) − 3a(2 + a)

Distribute:

= (−a)(−4) + (−a)(−5a) + −3a^2 + −6a

= 4a + 5a^2 + −3a^2 + −6a

Combine Like Terms:

= 4a+5a^2 + −3a^2+ −6a

= (5a2+ −3a^2) + (4a + −6a)

= 2a2 + −2a

Final Answer:

= 2a^2−2a!

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Find the common ratio for the geometric sequence defined by the formula: an=40(2‾√)n−1 a n = 40 ( 2 ) n − 1
WITCHER [35]

The ratio of the geometric sequence 402^{n-1} is 2.

Given that geometric sequence is 40*2^{n-1} and we have to find the common ratio of all the terms.

Geometric sequence is a sequence in which all the terms have a common ratio.

Nth termof a GP is ar^{n-1} in which a is first term and r is common ratio.

Geometric sequence=40*2^{n-1}

We have to first find the first term, second term and third term of a geometric progression.

First term=40*2^{1-1}

=40*2^{0}

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Second term=40*2^{2-1}

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Third term=40*2^{3-1}

=40*2^{2}

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Ratio of first two terms=80/40=2

Ratio of next two terms=160/80=2

Hence the common ratio of geometric sequence is 2.

Learn more about geometric progression at brainly.com/question/12006112

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