Question 770382
(a) Use the quadratic formula to solve the equation 
3p2 + 5p — 11 = 0.
Give your answers correct to two decimal places.
MY ANSWER: 1.25   and    -2.92  are these correct?
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*[invoke solve_quadratic_equation 3,5,-11]

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It's correct to 2 places.
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(b) Find the discriminant of the quadratic expression 7x2 — 3x — 11.
MY ANSWER:   d=317    is it correct?
Disc = b^2 - 4ac = 9 + 4*(7*11) = 317
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(c)  Write the quadratic expression x2 — 34x + 9 in completed-square
form.
MY ANSWER: (x-7)^2=280   is it correct?
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{{{x^2 - 34x + 9 = (x - 17)^2 + 280}}}
Not (x-7)^2
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(d)  Use the completed-square form from part (c) to solve the equation x2 — 34x + 9 = 0, leaving your answer in exact (surd)form.
MY ANSWER: x1=7+2surd70    and x2=7-2surd70  are these correct?
Use sqrt, not surd
Use ^ for exponents, Shift 6
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 x^2 - 34x + 9 = 0
{{{ x^2 - 34x = -9}}}
{{{x^2 - 34x + 289 = -9 + 289 = 280}}}
{{{(x - 17)^2 = 280}}}
{{{x-17 = sqrt(280)}}}
{{{x -17 = -sqrt(280)}}}
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(e)  Use the completed-square form from part (d) to write down the
vertex of the parabola y = x2 — 34x + 9
MY ANSWER: y=-280   x=7  are these correct?