how to solve a quadratic inequality
in the case you have ax2+bx+c>n where a,b,c and n are all real integers (non fractions, ration numbers that can be +ve or -ve) use the quadratic formula [-b+/-(b2-(4c))1/2]/2a to first find the roots of the curve. draw the curve intersecting the x axis at these points. you will be able to see where the curve is larger than x=n and be able to shade the correct region.
JB
Related Maths GCSE answers
All answers ▸If 2x + y = 13 and 3x - y = 12, what are the values for x and y?
There are n sweets in a bag. 6 are Orange, the rest are Yellow. Hannah takes a sweet out of the bag, and eats it, she does this twice. The Probability of Hannah eating two orange sweets is 1/3. Show that n^2 - n - 90 =0, and solve to find the value of n.
Make y the subject of the formula x=(2y-1)/(4-y)
In a village the number of houses and the number of flats are in the ratio 7 : 4 the number of flats and the number of bungalows are in the ratio 8 : 5 There are 50 bungalows in the village. How many houses are there in the village?