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 ▸Solve 2x+5=9
A cuboid with a volume of 912cm^3 has the dimensions 4 cm, (x + 2) cm and (x + 9) cm. Find an equation in terms of x and solve to find the dimension.
Do I need to write down all of my working out?
Lottie has a bag of applies. She gives half of them to Fred. Fred eats two and then has four left. How many apples did Lottie have at the start?