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Help me please I need it!!
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5 votes
Help me please I need it!!

Help me please I need it!!-example-1
User OFca
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2 Answers

0 votes
The answer is 5. 5 is the answer
User Swapnonil Mukherjee
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5.9k points
6 votes

Answer:

5

Explanation:

f(-4) = sqrt(2(4)^2 -7) (Plug in -4)

f(-4)= sqrt(2(16)-7) (Square 4 which is 16)

f(-4)=sqrt(32-7) (Multiply by 2)

f(-4)=sqrt(25) (Subtract 7)

f(-4)=+/- 5 (take the square root of 25 which is postive/negative 5)

Since this is a function there can only be one y to an x the positive 5 is the only answer

User Daniel Doblado
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