Factorise x^2+3x+4 without the use of quadratic formula
We use the form ax^2+bx+cTo factorise we need to put the equation into 2 bracketsThese 2 brackets will be in the form (x+k)(x+j) where k and j are to be foundWe need to find a combination of k and j for which k+j=b and k*j=c
For this example:(x+1)(x+2)
WC
Related Maths GCSE answers
All answers ▸Olly drove 56 km from A to B. He then drives 61 km from B to C. Olly’s average speed from A to B was 70 km/h. Olly took 75 minutes to drive from B to C. Work out Olly’s average speed for his total drive from A to C.
A,B and C all lie on the line x^2 + y^2 = 49 where A is on the y axis, B is on the X axis and C is the mid point of the straight-line connecting A and B.
Finding out the length of one side of a triangle
Solve the equation 18x^2-3x=6