diff --git a/Grade 10/Math/MPM2DZ/Math Oral Presentation Questions/Quadratic Equations.md b/Grade 10/Math/MPM2DZ/Math Oral Presentation Questions/Quadratic Equations.md index 1bfe16a..0b28236 100644 --- a/Grade 10/Math/MPM2DZ/Math Oral Presentation Questions/Quadratic Equations.md +++ b/Grade 10/Math/MPM2DZ/Math Oral Presentation Questions/Quadratic Equations.md @@ -78,10 +78,6 @@ $`4w^2 + 30w = 54`$ $`2w^2 + 15w - 27 = 0`$ -$`2 \quad \quad -3`$ - -$`1 \quad \quad 9`$ - $`(2w-3)(w+9) = 0`$ $`w = \dfrac{3}{2}, -9`$ @@ -118,10 +114,6 @@ Use discriminant, where $`D = b^2 - 4ac`$. $`y = 12x^2 - 5x - 2`$ -$`3 \quad \quad -2`$ - -$`4 \quad \quad 1`$ - $`y = (3x-2)(4x+1)`$ $`\therefore`$ The $`x`$-intercepts are at $`\dfrac{2}{3}, \dfrac{-1}{4}`$ @@ -192,7 +184,7 @@ $`t = \dfrac{12.8 \pm \sqrt{151.04}}{6.4}`$ $`\because t \ge 0`$ -$`\therefore t = \dfrac{12.8 \pm sqrt{151.04}}{6.4}`$ +$`\therefore t = \dfrac{12.8 \pm \sqrt{151.04}}{6.4}`$ $`\therefore t \approx 3.9`$ @@ -206,10 +198,6 @@ $`16t^2 - 96t + 128 = 0`$ $`t^2 - 6t + 8 = 0`$ -$`1 \quad \quad -2`$ - -$`1 \quad \quad -4`$ - $`(t-2)(t-4)`$, at seconds $`2`$ and $`4`$, the rocket reaches $`128m`$.