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Wewaii [24]
4 years ago
14

Factor

= 0" alt=" {4y}^{2} - 1 = 0" align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
adell [148]4 years ago
3 0

Answer:

The given expression is factorized as 4y^2 - 1 = 0  \implies  (2y -1)(2y +1)  = 0

Step-by-step explanation:

Here, the given expression to factorize is: 4y^2 - 1 = 0

Now, using Algebraic Identity:

a^2 - b^2 = (a + b) (a-b)

Now here let a  = 2y , b = 1

⇒ (a)  ^2 =  (2y)^2  = 2y \times 2y =  4y^2\\\implies  4y^2 = (2y)^2

So, The given expression is equivalent to:

4y^2 - 1 = 0  \implies  (2y)^2 - (1)^2 = 0\\\implies (2y -1)(2y +1)  = 0

Hence the given expression is factorized as 4y^2 - 1 = 0  \implies  (2y -1)(2y +1)  = 0

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6x^2 +7x=20

6x^2+7x-20=0

(3x−4)(2x+5)

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The rate of growth of profit​ (in millions) from an invention is approximated by Upper P prime (x )equals x e Superscript negati
Alecsey [184]

Answer:

The function is  P(x) =  \frac{1}{2} e^{-x^2} +0.016

Step-by-step explanation:

From the question we are told that

    The rate of growth  is  P'(x) =  xe^{x} - x^2

     The total profit is P(2)  =$25,000

      The time taken to make the profit is x =  2 \ years

         

From the question

     P'(x) =  xe^{-x^2}  is the rate of growth

  Now here x represent the time taken

Now the total profit is mathematically represented as

       P(x) =  \int\limits {P'(x)} \,  =   \int\limits {xe^{-x^2}} \,

So using substitution method

   We have that

                      u =  - x^2

                      du =  2xdx

  So  

        p(x) =  \int\limits {\frac{1}{2} e^{-u}} \, du

       p(x) =  {\frac{1}{2} [ e^{-u}} +c ]

       p(x) =  {\frac{1}{2}  e^{-x^2}} + \frac{1}{2} c      recall  u =  - x^2   and  let  \frac{1}{2} c =  Z

       

At  x =  2 years  

     P(x)  =$25,000

So

       Since the profit rate is in million

    P(x)  =$25,000 = \frac{25000}{1000000} =$0.025 millon dollars

So  

       0.025 =  {\frac{1}{2}  e^{-2^2}} + Z  

=>    Z = 0.025 - {\frac{1}{2}  e^{-2^2}}  

       Z = 0.016  

So the profit function becomes

         P(x) =  \frac{1}{2} e^{-x^2} +0.016

     

       

5 0
3 years ago
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