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4 years ago

Factored form of 2x^2+x-3

Mathematics

2 answers:

solniwko [45]4 years ago

5 0

Answer:

The factored form ⇒ (2x + 3)(x - 1)

Step-by-step explanation:

2x² + x - 3 = (2x + 3)(x - 1)

2x² = 2x × x

-3 = 3 × -1

First bracket is (2x + 3)

Second bracket is (x - 1)

Check Answer:

(2x + 3)(x - 1) = 2x² - 2x + 3x - 3 = 2x² + x - 3

murzikaleks [220]4 years ago

5 0

The correct answer is(2times and plz 3)(x-1)

Step by step explanation

(2*+3)(x-1)= two times to the power of 2-2 times +3 times minus three equals Two times to the power of 2+ X -3

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For i≥1 , let Xi∼G1/2 be distributed Geometrically with parameter 1/2 . Define Yn=1n−−√∑i=1n(Xi−2) Approximate P(−1≤Yn≤2) with l

murzikaleks [220]

Answer:

The answer is "0.68".

Step-by-step explanation:

Given value:

$X_i \sim \frac{G_1}{2}$

$E(X_i)=2 \\$

$Var (X_i)= \frac{1- \frac{1}{2}}{(\frac{1}{2})^2}\\$

$= \frac{ \frac{2-1}{2}}{\frac{1}{4}}\\\\= \frac{ \frac{1}{2}}{\frac{1}{4}}\\\\= \frac{1}{2} \times \frac{4}{1}\\\\= \frac{4}{2}\\\\=2$

Now we calculate the $\bar X \sim N(2, \sqrt{\frac{2}{n}})\\$

$\to \frac{\bar X - 2}{\sqrt{\frac{2}{n}}} \sim N(0, 1)\\$

$\to \sum^n_{i=1} \frac{X_i - 2}{n} \times\sqrt{\frac{n}{2}}} \sim N(0, 1)\\\\\to \sum^n_{i=1} \frac{X_i - 2}{\sqrt{2n}} \sim N(0, 1)\\$

$\to Z_n = \frac{1}{\sqrt{n}} \sum^n_{i=1} (X_i -2) \sim N(0, 2)\\$

$\to P(-1 \leq X_n \leq 2) = P(Z_n \leq Z) -P(Z_n \leq -1) \\\\$

$= 0.92 -0.24\\\\= 0.68$

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3 years ago

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lozanna [386]

Answer:

Step-by-step explanation:

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BlackZzzverrR [31]

Answer:

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Step-by-step explanation:

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0.31

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Factored form of 2x^2+x-3​

Factored form of 2x^2+x-3