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lakkis [162]
3 years ago
14

3x(x-2)-x^2+4=0 Help

Mathematics
1 answer:
antoniya [11.8K]3 years ago
3 0

Answer:

x=2,1 solving with quadratic formula

Step-by-step explanation:

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Write the function ????(x) = −2x^2 − 20x − 53 in completed-square form. Describe the transformations of the graph
siniylev [52]

Answer:

The graph of parent function reflected across x-axis, vertically stretched by factor 2 and shift 5 units left 3 units down.

Step-by-step explanation:

The parent function is

f(x)=x^2

The given function is

g(x)=-2x^2-20x-53

g(x)=-2(x^2+10x)-53

If an expression is x^2+bx, then we have to add (\frac{b}{2})^2 in it to make it perfect square.

In the parenthesis the value of b is 10.

(\frac{10}{2})^2=5^2=25

Add and subtract 25 in the parenthesis.

g(x)=-2(x^2+10x+25-25)-53

g(x)=-2(x^2+10x+25)-2(-25)-53

g(x)=-2(x+5)^2+50-53

g(x)=-2(x+5)^2-3

g(x)=-2f(x+5)-3 .... (1)

The translation is defined as

g(x)=kf(x+a)+b                .... (2)

Where, k is stretch factor, a is horizontal shift and b is vertical shift.

If 0<|k|<1, then the graph compressed vertically by factor k and if |k|>1, then the graph stretch vertically by factor k.

Negative k represents the reflection across x-axis.

If a>0, then the graph shifts a units left and if a<0, then the graph shifts a units right.

If b>0, then the graph shifts b units up and if b<0, then the graph shifts b units down.

From (1) and (2) it is clear that k=-2, a=5 and b=-3.

It means graph of parent function reflected across x-axis, vertically stretched by factor 2 and shift 5 units left, 3 units down.

3 0
4 years ago
Pls help me with this question math
iogann1982 [59]
X = 21
ABC has a scale factor of 3, so each value is x3
7x3 = 21
7 0
2 years ago
Solve the system by the linear combination method show all work carefully
suter [353]
<span>A-2b=2
A-b=6

</span>
<span>A-2b=2
-2(A-b=6)
-2A+2b= -12

A-2b=2
-2A+2b = -12
-------------------
-A = -10
-A/-1 = -10/-1

A = 10

a-b=6
10 - b = 6
10-10-b = 6 -10
-b = -4
-b/-1 = 14/-1
b= 4

Check
a - 2b =2
10 - 2(4) =2
10 - 8 = 2
2=2


</span>
7 0
3 years ago
Find the length of the missing side
Harman [31]

Answer:

the answer is either C or D

4 0
3 years ago
Read 2 more answers
What is the value of the expression 8with a exponent of -2?
Ivan
<span>8^<span>−2
</span></span><span>=<span>1/(<span>8*8)
</span></span></span><span>=</span><span><span><span>1/64
</span>the answer is 1/64</span></span>
5 0
4 years ago
Read 2 more answers
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