Answer:

Step-by-step explanation:
we are given that

we want to figure out x
remember that,
In <u>unit</u><u> </u><u>circle</u> x coordinate is considered cos and y coordinate is considered sin
so in order to figure out x we should figure out the value of <u>cos</u> to do we can consider <u>Pythagoras</u><u> trig</u><u> </u><u>indentity</u>
given by

we are given sin=-√7/4 thus
substitute:

simplify square:

move left hand side expression to right hand side and change its sign:

simplify Substraction:

square root both sides:

since in unit circle cos is x and P belongs to Q:IV negative cos isn't applicable
hence,

<span>The completely factored form of 9x^2+24x+16 is equal to
</span><span>9x^2+24x+16
(3x + 4) (3x + 4)
Since the two factors are the same, this can be simplified as
</span>(3x + 4) (3x +<span> 4)
</span>(3x + 4)^2
It is a perfect square factor.
Answer:
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Step-by-step explanation:
Answer:
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Step-by-step explanation: