Solve n^2+n-90=0 to find the value of n?
Using the quadratic formula with a calculator a=1 b=1 c=-90 answers are n=-10 and n=9Factorising (n-9)(n+10)=0 answers are n=-10 and n=9
AL
Related Maths GCSE answers
All answers ▸How do I approach simultaneous equations with 2 unknowns?
Find the coordinates of the point of intersection of the lines 2x + 3y = 12 and y = 7 - 3x.
Find the mean, median, mode and range of this data: 2, 5,6,12,5
The equation of the line L1 is y = 3x – 2 . The equation of the line L2 is 3y – 9x + 5 = 0 Show that these two lines are parallel.