(3+5i)(3-5i) please show work!

Mathematics

1 answer:

Alexxandr [17]2 years ago

5 0

Answer:

Step-by-step explanation:

(3 + 5i)(3 - 5i) = 9 - 25i^2

because i^2 = -1 9 - 25i^2 = 9 - 25x-1 = 34

hope this helped

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F(x) = x2 – 2x - 8

maw [93]

Answer:

The y-intercept is the point (0,-8)

see the attached figure

Step-by-step explanation:

we have

$f(x)=x^{2}-2x-8$

we know that

The y-intercept is the value of the function f(x) when the value of x is equal to zero

For x=0

$f(x)=0^{2}-2(0)-8\\f(x)=-8$

therefore

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see the attached figure to better understand the problem

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1 year ago

How do you solve st+3t=6

bonufazy [111]

You will factor out the common factor of t if you are solving for t. you will then divide both sides by (s+3) to make t the subject of the formula. for this question you can only get t in terms of s.
so:
st+3t=6
t(s+3)/(s+3)=6/(s+3)
t=6/(s+3)

if you are required to solve for s then you are going to subtract 3t from both sides. you can factorise 6-3t .you will then divide both sides by t to isolate s.for this question you can only get s in terms of t.so:

st+3t-3t=6-3t
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goblinko [34]

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Step-by-step explanation:

Given the following function:

$h(x)=-\frac{1}{4}x^2+\frac{1}{2}x+\frac{1}{2}$