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alina1380 [7]
4 years ago
9

How much less than 3x2−7x+9 is 2x2+4x−8? What is the value of the result when x=2?

Mathematics
1 answer:
DIA [1.3K]4 years ago
6 0
3x^2 - 7x + 9 - (2x^2 + 4x - 8).....distribute the - thru the parenthesis
3x^2 - 7x + 9 - 2x^2 - 4x + 8....combine like terms
x^2 - 11x + 17 <== this is how much less it is

x^2 - 11x + 17.....when x = 2
2^2 - 11(2) + 17 =
4 - 22 + 17 =
21 - 22 =
-1 <==== 
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