When would I use the quadratic formula?
You would use the quadratic formula when trying to find the value of a variable such as x in a quadratic equation but it can not be successfully factorised with whole numbers. Treating the the equation in the form ax2+bx+c=0 then putting the values into the equation, two values of x will be found from switching the sign in the equation.
EO
Related Maths GCSE answers
All answers ▸The new reading for James' electricity bill is 7580, and the old reading is 7510, the price per unit is 13p, how much does James have to pay for his electricity?
ln(2x^2 +9x-5) =1+ ln( x^2+2x-15)
Why is it that when I am asked to factorise 3x^2-13x-10, I am not able to cancel two of the x's so that the answer is 3x-13-10?
3/(x-1) - 2/(x+1) = 1 Solve to find the values of x.