Complete the square on the equation (x^2)-4x-3
x2-4x-3 First factorise into squared form and expand.(x-2)2=x2-4x+4Balance the equations.x2-4x+4 needs to be x2-4x-3This leads to(x-2)2-4-3 to get rid of the +4 from factorising.Leaving finally(x-2)2-7As an extension could ask the student about minimum value of the curve
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Related Maths GCSE answers
All answers ▸Solve the simultaneous equations to find x and y: 2x - 2y = 20, x + 4y = 5
How do you complete a square
You are told that the y is proportional to x^2 and that when y=75, x=5. Find a formula for x in terms of y.
Convert 0.1727272... to a fraction in its lowest terms.