Answer this question
1. Show that the quadratic f(x)=3x^2 - 6x+7 is always positive for all values of x.
2. Express x^2-4x+7 in the form a(x+p)^2+q and sketch the curve.
3. Express -x^2-2x+3 in the form a(x+p)^2+q and sketch the curve.
4. Write the following quadratic expressions in completed square form and sketch the graphs.
(a) x^2+4x+9
(b) 3x^2-18x-25
Happy trying...
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