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3 years ago

7

Identify the solution(s) of

title="y ^{2} - 2y - 8 = 7" alt="y ^{2} - 2y - 8 = 7" align="absmiddle" class="latex-formula">

1 answer:

Burka [1]3 years ago

8 0

Answer:

y= 5 and -3

Step-by-step explanation:

subtract 7 from both sides to get y^2-2y-15=0

factor the equation to get (y-5)(y+3)=0

add five on both sides to get y=5 and subtract 3 on both sides to get y=-3

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3 years ago

How do you solve this?

liberstina [14]

Answer:

The answer is

<h2> ${13}^{3}$ </h2>

Step-by-step explanation:

<h3> $( {13})^{2}( {13})^{ - 4} ( {13})^{5}$ </h3>

To solve the expression , use the rules of indices

Since the bases are the same and are multiplying we add the exponents

That's

<h3> ${a}^{x} \times {a}^{y} \times {a}^{z} = {a}^{x + y + z}$ </h3>

So we have

<h3> $( {13})^{2}( {13})^{ - 4} ( {13})^{5} = {13}^{2 - 4 + 5} \\ = {13}^{ - 2 + 5}$ </h3>

We have the final answer as

<h3> ${13}^{3}$ </h3>

Hope this helps you

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4 years ago