Solve the equation 18x^2-3x=6

First put the equation into the correct form by setting it to 0:18x^2-3x-6=0Look for the common factor in the equation and take it out:3(6x^2-x-2)Using the grid method (which I would show on whiteboard) factor the problem:3(3x-2)(2x+1)=0To find the values of x, set each bracket to equal zero and solve:3x-2=0, 3x=2, x=2/32x+1=0, 2x=-1, x=-1/2There are 2 possible values of x because this is a quadratic equation so looking at the graph of the equation we would be able to see that the graph crosses the x axis at 2 different points

GH

Related Maths GCSE answers

All answers ▸

Solve the equation x^2-x-56=0


Raya buys a van for £8500 plus VAT at 20%. Raya pays a deposit for the van. She then pays the rest of the cost in 12 equal payments of £531.25 each month. Find the ratio of the deposit Raya pays to the total of the 12 equal payments.


Why do we bother using surds?


A ten-sided die with sides numbered 1-10 is thrown. What is the probability of throwing a 1?