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3 years ago

6x^2 - 21 = 9 solve for x

1 answer:

8 0

Answer:

$x=$ $\sqrt{5}$ , - $\sqrt{5}$

Step-by-step explanation:

Move everything to left side and set it equal to 0

Solve using quadratic formula

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Answer: $5^6=15,625$

Step-by-step explanation:

To solve this exercise it is important to remembet the definition Definition of a Logarithm:

If $x >0$ and, $b>0,$ $b\neq 1$ , then $y = log_bx$ is equivalent to $b^y=x$ (which is the exponential form).

Knowing this definition and having the following logarithmic equation:

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You can identify that:

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Therefore, susbtituting values into $b^y=x$ , you can rewrite this equation as an exponential equation. Then:

$5^6=15,625$

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