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Nuetrik [128]
3 years ago
14

The square of a number is equal to 10 less than 7 times that number. What are two possible solutions

Mathematics
1 answer:
ad-work [718]3 years ago
3 0

Answer:y=2 or 5

Step-by-step explanation:

let the number be y

y^2=7y-10

y^2-7y+10=0

y^2-2y-5y+10=0

y(y-2)-5(y-2)=0

(y-2)(y-5)=0

y-2=0 y-5=0

y=2 y=5

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3 years ago
the sum of two numbers is 15 less than twice the first number their difference is 5 less than twice the second number.  Find the
Marina86 [1]
X --- <span>first number
y --- </span><span>second number

x + y = 2x - 15
x - y = 2y - 5

x - 2x + y = -15
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-x + y = -15
x - 3y = - 5
-----------------
-2y = -20  /:(-2)
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Ans.:
x = 25
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5 0
4 years ago
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Answer:

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Step-by-step explanation:

1)

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2)

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