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Elena-2011 [213]
3 years ago
10

Help me with this please!

Mathematics
1 answer:
zepelin [54]3 years ago
3 0

Answer: -x - 3√x + 4

(1 - √x)(√x + 4)

= √x + 4 - √x.√x - 4√x

= -x - 3√x + 4

Step-by-step explanation:

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Consider the function f(x) = x2 + 2x – 15. What are the x-intercepts of the function? Left-most x-intercept: ( , 0) Right-most x
Irina-Kira [14]

Answer:

(- 5, 0) and (3, 0)

Step-by-step explanation:

Given

f(x) = x² + 2x - 15

To find the x- intercepts let f(x) = 0, that is

x² + 2x - 15 = 0 ← in standard form

(x + 5)(x - 3) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5 ← left x- intercept

x - 3 = 0 ⇒ x = 3 ← right x- intercept

9 0
3 years ago
Read 2 more answers
Mellisa created a graph
vovikov84 [41]

Answer:

no she didn't

Step-by-step explanation:

melissa has no hands

6 0
3 years ago
Y''-2y'+y=2(e^x)-3(e^-x)
labwork [276]
First find the characteristic solution. The characteristic equation is

r^2-2r+1=(r-1)^2=0

which as one root at r=1 of multiplicity 2. This means the characteristic solution for this ODE is

y_c=C_1e^x+C_2xe^x

For the nonhomogeneous part, you can try a particular solution of the form

y_p=(a_2x^2+a_1x+a_0)e^x+be^{-x}

which has derivatives

{y_p}'=(a_2x^2+(2a_2+a_1)x+a_1+a_0)e^x-be^{-x}
{y_p}''=(a_2x^2+(4a_2+a_1)x+2a_2+2a_1+a_0)e^x+be^{-x}

Substituting into the ODE, the left hand side reduces significantly to

2a_2e^x+4be^{-x}=2e^x-3e^{-x}

and it follows that

\begin{cases}2a_2=2\\4b=-3\end{cases}\implies a_2=1,b=-\dfrac34

Therefore the particular solution is

y_p=x^2e^x-\dfrac34e^{-x}

and so the general solution is the sum of the characteristic and particular solutions,

y=y_c+y_p
y=C_1e^x+C_2xe^x+x^2e^x-\dfrac34e^{-x}
3 0
3 years ago
If eight ounces equals one cup, which expression would you use to find the number of ounces in six cups?
Lina20 [59]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
Marvin bought 0.6 pounds of almonds and 1.73 pounds of cashews at the store what is the total weight of the almonds and cashews
Kipish [7]
2.33 is the answer for your question


3 0
3 years ago
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