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Mice21 [21]
3 years ago
10

Evaluate the expression when a= -7 and b=2a-4b​

Mathematics
1 answer:
Yanka [14]3 years ago
7 0
  • a = - 7
  • b = 2

a - 4b

= (-7) - 4(2)

= - 7 - 8

= <u>-</u><u> </u><u>1</u><u>5</u><u>.</u>

Hope it helps ya :))

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X squared minus 7x plus 10 equals 0
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Let's factor out the equation first.

x² - 7x + 10

x             -2
x             -5

This factoring of (x-2)(x-5) fit the equation.

(x-2)(x-5) = 0

One of the factors must equal 0 as to equal zero.

Either x - 2 = 0 or x - 5 = 0

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x - 5 = 0
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The two answers are x = 2 or x = 5. Hope this helps!
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