Solve x^2+2x-4, leaving your answer in the simplist surd form. (4marks)
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Simplist surd form means use Quadratic equation
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Write out Quadratic equation
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Write out value of a, b and c
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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 ▸Simplify: 5a + 2 – a + 9
Solve x^2 – 6x – 8 = 0 Write your answer in the form a ± √ b where a and b are integers. (Higher tier paper)
The equation of the regression line of y (retail price, £) on x (number of pages) for a set of books is y = 0.02x + 1.35. How can I use this equation?
Increase £190 by 25%