4x − 3 + 5 = 2x + 7 − 8x

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

8 0

Answer:

x = 0.5

Step-by-step explanation:

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Find the non-extraneous solutions of the square root of the quantity x plus 9 minus 5 equals quantity x plus 4

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I"m guessing you mean
$\sqrt{x+9} -5=x+4$
add 5 to both sides
$\sqrt{x+9}=x+9$
square both sides
x+9=x²+18x+81
minus x+9 both sides
0=x²+17x+72
factor
what 2 numbres multiply to get 72 and add to get 17?
8 and 9
0=(x+8)(x+9)
set to zer

0=x+8
x=-8

x+9=0
x=-9

test each

$\sqrt{-8+9} -5=-8+4$
$\sqrt{1} -5=-4$
1-5=-4
-4=-4
true

$\sqrt{-9+9} -5=-9+4$
$\sqrt{0} -5=-5$
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true

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Given: f(x) = x + 2 and g(x) = 3x + 5 <br> f (x)/g (x) =

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