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 ▸Solve x^2 - 10x + 21 = 0 through the following methods: Factorisation, Completing the Square and using the Quadratic Formula
Tom bought a full bag of coal. After one week the bag was 2/3 full. During the next week he used 1/4 of the remaining coal. How much is left?
Draw the graph y=tanx in the region -180 degrees =< x =< 180 degrees
How do I know when to use sin, cos or tan?