Solve 3x^2 + 6x – 2 = 0 Give your solutions correct to 2 decimal places.

3x2 + 6x - 2 = 0 When we have a polynomial with powers of x up to 2 (a quadratic equation) we can apply the quadratic formula : -b ± root(b2-4ac)/2a where your equation is in the form ax2 + bx + c 0 so applying it here we get two solutions: - 6 ± root(36 - 43-2)/2*3 = - 6 ± root (60)/6

MS

Related Maths GCSE answers

All answers ▸

Differentiate y = e^(2x)cos(3x)


How do you simplify a surd?


Solve 3(2y - 1) = 6


White paint costs £2.80 per litre. Blue paint costs £3.50 per litre. White paint and blue paint are mixed in the ratio 3 : 2 Work out the cost of 18 litres of the mixture.