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Earn +20 ptsQ: What is the discriminant of 2x2 plus 5x plus 28 equals 0?
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What is the discriminant to determine how many real number solutions the quadratic equation -4j2 plus 3j-28 equals 0 has?
The discriminant is -439 and so there are no real solutions.
Use the discriminant to determine how many real number solutions the quadratic equation -4j to the second power plus 3j - 28 equals 0 has?
It has no real roots.
What is the centre and its diameter of the circle 2x2 plus 2y2 plus 2x -6y -9 equals 0?
It works out that the centre of the circle is at (-0.5, 1.5) and its diameter is the square root of 28
What is the value of 2x squared plus x when x equals minus 4?
For x = -4 2x2 + x = 2 (-4)2 + (-4) = 32 - 4 = 28
What is 22 plus 22 plus 28 plus 28 equals?
22+22+28+28=100.
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