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77julia77 [94]
2 years ago
6

Solve for x.this is for the k12 test.​

Mathematics
2 answers:
Paladinen [302]2 years ago
5 0

Answer:

option D

Step-by-step explanation:

\sqrt{10x+50}=x+5\\\\(\sqrt{10x+50})^2=(x+5)^2\\\\10x+50=x^2+10x+25\\\\0=x^2+10x-10x+25-50\\\\0=x^2-25\\\\0=(x-5)(x+5)\\\\x=5\\\\x=-5

now trying for the original equation

\sqrt{10(5)+50}=5+5\\\\\sqrt{50+50}=10\\\\\sqrt{100}=10\\\\10=10

and

\sqrt{10(-5)+50}=-5+5\\\\\sqrt{-50+50}=0\\\\\sqrt{0}=0\\\\0=0

so it's option D

Sidana [21]2 years ago
3 0

Answer:

d

Step-by-step explanation:

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