Solve x^2+2x-4, leaving your answer in the simplist surd form. (4marks)
-
Simplist surd form means use Quadratic equation
-
Write out Quadratic equation
-
Write out value of a, b and c
-
Fit these values into equation
Now the maths starts. Area's where students are likely to make mistakes are with use of signs (+ or -) and with simplifying surd.
DR
Related Maths GCSE answers
All answers ▸A right-angle triangle has three sides (diagram would be included). Side A = 3cm; Side B = 7cm. What is the length of Side C (the hypotenuse)? Give your answer to 2 d.p.
Plot the graph, y=2x^2 -7x +4
Calculate the interest on borrowing £40 for 3 years if the compound interest rate is 5% per year.
(e*sqrt(e))/cuberoot(e^2)=e^k find k