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Earn +20 ptsQ: 9x2 plus 16 equals 0
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How many x-intercepts does the graph of y equals 9x2 plus 30x plus 25 have?
Factorising, we have, 9x2+ 30x + 25 = (3x + 5)2;thus, when y = 0, x = -1⅔. This tells us that the sole x-intercept of this function is at the vertex, (0, 1⅔).
Solve the system of equations Enter your answer as an ordered pair 4x plus 8y equals 16 4x minus 8y equals 0?
16
What is the solution to the two equations 2x - y equals 16 and -x plus 2y equals -8?
y = 0 and x = 8.
In parallelogram ABCD AB equals 12 BC equals 16 plus 2x what is x?
Anything you like (as long as it is > -16 so that BC > 0). In a parallelogram, adjacent sides do not impose any restrictions on one another.
What is the discriminant of the polynomial 9x2 - 18x 9?
The discriminant is 0.
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