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3 years ago

15

Write an expression to represent the sum of three times the square of a number and -7 . In your expression what is the value of

the constant?

1 answer:

stich3 [128]3 years ago

8 0

Answer:

Step-by-step explanation:

3x^2-7

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Step-by-step explanation:

We need to solve the equation f(x)=g(x)

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$f(x)=g(x)\\(\frac{1}{2})^2-3=3x + 5\\\frac{1}{4}-3=3x + 5\\Subtarct\,\,5\,\,on\,\,both\,\,sides:\\\frac{1}{4}-3-5=3x + 5-5\\\frac{1}{4}-8=3x\\Taking\,\,LCm\,\,on\,\,left\,\,side\\\frac{1-8*4}{4}=3x\\\frac{-31}{4}=3x\\Divide\,\,both\,\,sides\,\,by\,\,3\\x=\frac{-31}{4*3}\\x=\frac{-31}{12}$

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The graph will be a straight line x= -2.58 or x = -31/12

Keywords: Composition of Functions

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