Perform the operation. (9x2 - 8) - (-4x2 - 5x)Anyone know this one?
1 answer:
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Answer:
Step-by-step explanation:
So we have the equation:
First, let's determine the domain restrictions. Recall that the radicand cannot be negative. In other words, it must be greater than or positive than 0. Thus:
Subtract 6 from both sides:
What this means is that our solutions must be greater than or equal to -6. If not, we ignore them.
So, let's subtract 5 from both sides from the original equation:
Square both sides:
Subtract 6 from both sides:
138 is greater than -6, so 138 is a solution and is the only solution.
And we're done!
Answer:
All of the above
Step-by-step explanation:
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