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Anastaziya [24]
3 years ago
6

Which of the following is an extraneous solution of square root -3x-2=x+2?

Mathematics
2 answers:
timofeeve [1]3 years ago
6 0
Hello,

Answer A (x=-6 is an extraneous solution)

√(-3x-2)=x+2
==>-3x-2>=0
==>x<= -2/3

So -3x-2=(x+2)²
==>-3x-2=x²+4x+4
==>x²+7x+6=0
==> (x=-6) or (x=-1)

if x=-6 then
√(-3*(-6)-2)=√16=4
-6+2=-4
False 4≠-4

if x=-1
√(-3*(-1)-2)=√1=1
-1+2=1
ok..


Reika [66]3 years ago
6 0

Answer:

A. x=-6

Step-by-step explanation:

i got it right on edge

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Answer:

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Step-by-step explanation:

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3 years ago
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iragen [17]

<u>Given</u>:

The height of the bird at time t is given by the function h(t)=-4.9t^2+6t+50

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The time can be determined by substituting h(t) = 0 in the function.

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Switch sides, we get;

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The values of t are given by

t=\frac{-6 + 31.87}{-9.8}   and   t=\frac{-6 - 31.87}{-9.8}

t=\frac{25.87}{-9.8}    and   t=\frac{-37.87}{-9.8}

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Thus, the time taken by the bird to eat the worm is t=3.9 seconds.

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Step-by-step explanation:

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