Factoring, vertices, roots that a situation rejects, and the discriminant: twelve questions on choosing the form of a quadratic that already contains the…
12 questions • Zestly
• Which expression is the fully factored form of $x^2 + 7x + 10$?
• What are the solutions to the equation $x^2 - 9x + 18 = 0$?
• Which expression is equivalent to $2x^2 + 5x + 3$?
• The height of a thrown ball, in feet, is $h(t) = -t^2 + 4t + 5$, where $t$ is the time in seconds since it left the hand. Which form of…
• A parabola is given by $y = (x - 3)^2 + 4$. Which of these can be read straight off that expression, with no calculation at all?
• Which of the following expressions is equivalent to $x^2 - 16$?
• A small workshop models its daily profit, in dollars, by $P(x) = -x^2 + 10x - 16$, where $x$ is the number of units it sells that day. What…
• A gardener has a fixed length of fencing, and for a rectangle of width $w$ meters the enclosed area in square meters is $A(w) = -w^2 +…
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