Update Quadratic Equations.md

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 $`128m`$.