Grade 11 · Algebra 2
x = (−b ± √(b² − 4ac)) / 2a — a top US search. Written in American English for students, parents, and teachers in the United States.
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Answer: x = (−b ± √(b² − 4ac)) / 2a
It solves ax² + bx + c = 0.
Answer: b² − 4ac
It tells how many real roots.
Answer: no real roots
The graph does not cross the x-axis.
Answer: one real root (a repeated root)
The vertex sits on the x-axis.
Answer: x = −b/(2a)
It is a vertical line through the vertex.
Answer: a > 0
a is the coefficient of x².
Answer: multiply two binomials
(x+2)(x+3) = x² + 5x + 6.
Answer: x = 2 and x = 3
Factors as (x−2)(x−3).
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