The lines y = 3x² - x + 5/2 intersects the line y = x/2 +7 at two points. Give their coordinates. Show your working
y= 3x2 -x +5/2 = 0.5 x +76x2 -2x +5 = x+146x2 - 3x -9 = 0 = 2x2 - x -3(2x-3)(x+1) = 0 x = -1 or x = 1.5y = 6.5 or y = 7.75
Related Maths A Level answers
All answers ▸Polynomial long division, how do I do it?
Locate the position and the nature of any turning points in the function: 2x^3 - 9x^2 +12x
The quadratic equation 2x^2+8x+1=0 has roots a and b. Write down the value of a+b and ab and a^2+b^2.
How do you sketch r=theta? I don't really understand polar coordinates.