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zubka84 [21]
2 years ago
15

3

Mathematics
1 answer:
Lina20 [59]2 years ago
7 0

Answer:

Bb-2=4

Step-by-step explanation:

b+4=8:is incorrect 2+4=6

2b-3=0 is incorrect 2(2)-3=1

25+24=30 also incorrect

Bb -2=4 is corrext since B(2)-2=4 is same as 2B-2=4:which is the correct equation

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Answer:

(x-8)(x+7)

Step-by-step explanation:

using quadratic formula we have

x=  \frac{-b+-\sqrt{b^{2}-4*a*c}}{2*a}

we have:

x^2-x-56=0

a= 1 b=-1 c=-56

so we have:

x=(-(-1)+-sqrt(1^1-4*(1)*(-56)))/(2*1)

x=1+-sqrt(1-4*(-56))/(2)

x=(1+-sqrt(225))/2

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so we have the roots:

x1=(1+15)/2 =8

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so the answer is (x-8)(x+7)

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