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iragen [17]
3 years ago
13

X 2 + 13x + 40 = 0 solving quadratic

Mathematics
2 answers:
Gnesinka [82]3 years ago
8 0

Answer: x=-5 or x=-8

Step-by-step explanation:

x^2+13x+40=0

x^2 + 8x + 5x +40=0

x(x+8)+5(x+8)=0

(x+5)(x+8)=0

x+5=0 or x+8=0

x=-5 or x=-8

Arte-miy333 [17]3 years ago
3 0
Answer x=-5 or x=-8
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During the winter registration, 72 athletes signed up to play basketball. If they have 6 even team, how many players are on each
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Answer:

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Step-by-step explanation:

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2 years ago
For the given statement Pn, write the statements P1, Pk, and Pk+1.
Leno4ka [110]

Answer:

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Step-by-step explanation:

We are given the statement,

P_{n} as 2 + 4 + 6 + . . . + 2n = n(n+1)

That is,

P_{n} as 2 + 4 + 6 + . . . + 2n = \sum_{i=1}^{n}2i

So, we have,

P_{1} = \sum_{i=1}^{1}2i = 2

P_{k} = \sum_{i=1}^{k}2i = 2 + 4 + 6 + . . . + 2k = k(k+1)

P_{k+1} = \sum_{i=1}^{k}2i = 2 + 4 + 6 + . . . + 2k + 2(k+1) = (k+1)(k+2)

Thus, we get,

P_{1} =  2

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P_{k+1} = (k+1)(k+2)

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