Kamis, 14 Oktober 2010

1st Examination : Quadratics

1st Examination of Mathematics
Material : Quadratics
Grade : X
School : SMA 1 Blitar

Answer on your paper correctly!

1. Find the range of values of x for which :
(x+2)^2 - 8(x+2) + 15 > 0
2. Given that p and q,are the roots of 2x^2 + 5x - 4 = 0.
Calculate the value of : p^3 + q^3
Hence, construct the new quadratic equation which roots are p/q and q/p.
3. Find the range values of k for which k(x^2 + 2x + 3) - 4x - 2 is always positive
for all real values of x.
4. The curve y = (k - 6)x^2 - 8x + k does not intersect the x-axis and it has
a minimum point. Find the range values of k.

Note : Date of submission : Oct, 22
Do by yourself on a folio size.

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