Solving Quadratic Equations
x^2+5x+6=0 When solving quadratic equations our goal is to revert back into the form (x+a)(x+b) from the form ax^2+bx+c Thus we need to have a method when completing this: A good method in this case is that we need to find two numbers a&b When expanding (x+a)(x+b) one term that is there is ab. Then we know that 6 must be the form of ab. So we need to find numbers that make 6. Hence its either 3x2, or 6x1 Then also when added or can be substracted in respect of a minus, together needs to make 5. Hence its 3x2. Graphically the way I would teach it is using the M&A Method Further Learning: We can use the quadratic formula to solve the equation
AN
Related Maths A Level answers
All answers ▸How do you intergrate sin^2(x)?
Identify two errors made by a student asked to evaluate the following integral (Will upload question to less space)
Find the derivative of sin(x)/x^3 with respect to x
Figure 1 shows a sector AOB of a circle with centre O and radius r cm. The angle AOB is θ radians. The area of the sector AOB is 11 cm2 Given that the perimeter of the sector is 4 times the length of the arc AB, find the exact value of r.