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Earn +20 ptsQ: What is 2x 4 X 7x-1?
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What are the points of intersection of the parabolas y equals x squared -2x plus 4 and y equals 2x squared -4x plus 4?
If: y = x^2 -2x +4 and y = 2x^2 -4x +4 Then: 2x^2 -4x +4 = x^2 -2x +4 Transposing terms: x^2 -2x = 0 Factorizing: (x-2)(x+0) => x = 2 or x = 0 Therefore by substitution points of intersect are at: (2, 4) and (0, 4)
If 2x - 6 equals 4 then what is the value of x?
2x -6 = 4 then 2x = 4 +6 x=10/2 = 5
2x plus 7 plus 2x equals 23?
2x + 7 + 2x = 23 4x + 7 = 23 4x = 16 x = 16/4 x = 4
What is x2 4x 4?
(x2+3x-4) (x-4)
What is the discontinuity and zero of the function fx the quantity of 2 x squared plus 5 x minus 12 all over x plus 4?
f(x) = (2x^2 + 5x - 12)/(x + 4) as given, is not defined when the denominator is 0 ie when x + 4 = 0 or x = -4. However, 2x^2 + 5x - 12 = (x + 4)*(2x - 3) so that the function can be simplified to (x + 4)*(2x - 3)/(x + 4) = 2x - 3 This has a zero when 2x - 3 = 0 ie 2x = 3 or x = 1.5
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