Find the two solutions to the quadratic equation x^2-9x+18
The constant 18 can be written in the form 3*6. Therefore the brackets will take the form (x 3)(x 6). In order to find the sign in between them, we have to write -9 using 3 and 6. -9=-3-6 so the brackets are (x-3)(x-6). So the solutions are x=3 and x=6.
FA
Related Maths GCSE answers
All answers ▸Factorise 5 – 10m
How can we calculate the sinus of 120°?
A car costs £300. The price is then reduced by 20%. However, the shop increases the new price by 15%. Fadhila says, "20 - 15 = 5, so the original price of the car has been reduced 5%". Is she right? What is the final price of the car?
Solve the quadratic equation x^2-6x+5=0