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Zinaida [17]
3 years ago
5

Use the distributive property to simplify -5(-2f-6)

Mathematics
2 answers:
nydimaria [60]3 years ago
7 0
-5(-2f-6)

-5•-2f = 10f
-5•-6=30

(negative • negative = positive)

10f+30 is your answer
Angelina_Jolie [31]3 years ago
4 0

-5(-2f-6)

 distribute by multiplying -5 by everything inside the parenthesis

-5 * -2f = 10f

-5 *-6 = 30

so you get 10f+30

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What two numbers add to 8 and multiply to 28
anygoal [31]
Find numbers that multiply to 28 and add them to see if they add to 8
28=
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we must use quadratic formula

x+y=8
xy=28

x+y=8
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y=8-x
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distribute
8x-x^2=28
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subtract 8x
x^2-8x+28=0

if you have
ax^2+bx+c=0 then x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}
so if we have
1x^2-8+28=0 then
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c=28

x=\frac{-(-8)+/- \sqrt{(-8)^{2}-4(1)(28)} }{2(1)}
x=\frac{8+/- \sqrt{-48} }{2}
x=\frac{8+/- 4 \sqrt{-3} }{2}
x=4+/- 2 \sqrt{-3}
x=4+/- 2i \sqrt{3}
there are no real numbers that satisfy this
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