Thank you so much! This is extremely helpful, will definetly watch again as it is just the perfect amount of information (all the essentials) and clear explanations! Saving for the morning of exams too :)
Im not the best at explaining but from what I've learnt, is when we solve a quadratic by factorising or completing the square we are essentially working it out as a reflection so we are solving the parabola/equation in a mirror but since we need the actual points/numbers we change the sign of the number from positive to a negative or a negative to a positive. we do this so that the parabola/equation is no longer a reflection but the real thing I hope this makes sense If it doesn't I can try reexplain for you :)
