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kolbaska11 [484]
3 years ago
11

Subtract X2 + 8x +9 - (x2 + 4x)

Mathematics
1 answer:
oee [108]3 years ago
5 0

Answer:

4x+9

Step-by-step explanation:

x^2+8x+9-(x^2+4x)

x^2-x^2+8x+9-4x

8x-4x+9

4x+9

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Step-by-step explanation:

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3 years ago
What is the Quadratic Equation for these three points- <br>(1,3) (3,5) (5,7) ​
zlopas [31]

The required equation is y = x + 2

<u>Solution:</u>

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A quadratic equation for three points is given by y = ax^2 + bx + c \rightarrow (1)

Assume the point 1,3 and substitute in (1)

\Rightarrow 3= a + b + c \rightarrow (2)

Let us substitute 3,5 in (1)

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Let us substitute 5,7 in (1)

\Rightarrow 7 = 25a + 5b + c \rightarrow (4)  

Subtracting 2 and 3  

\Rightarrow 9a + 3b + c = 5 - ( a+ b+ c = 3)

\Rightarrow 8a + 2b = 2  

\Rightarrow 4a + b = 1

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Subtracting 4 and 3  

\Rightarrow 25a + 5b + c = 7 - ( 9a + 3b + c = 5)  

\Rightarrow 16a + 2b = 2 \rightarrow (5)

Substituting b in 5, 16a + 2(1 -4a) = 2  

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\Rightarrow 0+1+c =3

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Substituting a, b, c in 1 we get the quadratic equation y = x + 2

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3 years ago
If f(x)=3x^2-x+3, then what is the remainder f(x) is divided by x+7?
Wittaler [7]

Answer:

Remainder is 157

Step-by-step explanation:

-7 | 3 -1    3

____-21_154

     3 -22 | 157

Answer is 3x-22 R157

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