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4 years ago

15-x=2(x+3) I need this solved and show me how you solved it

Mathematics

1 answer:

Sunny_sXe [5.5K]4 years ago

4 0

15 - x = 2(x + 3)
15 - x = 2x + 6
15 = 3x + 6
9 = 3x
3 = x
x = 3

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For the function $f(x)=x^2+3x+4$ , by substituting $x+h$ we get

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Then the difference quotient is

$\dfrac{f(x+h)-f(x)}h=\dfrac{(x^2+3x+4+(2x+3)h+h^2)-(x^2+3x+4)}h$

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