Formula sheet

Quick-reference formulas for Grade 11.

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Lesson Notes

Section 1 / 3

Standard form: $y=ax^2+bx+c$
Vertex form: $y=a(x-h)^2+k$
Factored form: $y=a(x-r_1)(x-r_2)$
Axis of symmetry: $x=-\frac{b}{2a}$
Quadratic formula: $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$
Discriminant: $D=b^2-4ac$

Short segments for focus-friendly pacing.

Key Points

Identify which formula fits the question
Check angle mode (degrees vs radians)
Use clear symbols before solving

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External Links

Khan Academy: High School Math Review (External)

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