well, 10x^2+3x-1 = (5x-1)(2x+1)
now the rest is a cinch.
The area of a tennis court can be represented approximately by the function A(x) = 10x2 + 3x - 1, and its length can be represented by l(x) = 5x - 1, where x is a distance, in metres.
a) Write and simplify a function, w(x), to represent the width of a tennis court. (2 marks)
b) If x represent 5 m, what is the approximate width of the court? (2 marks)
1 answer
1 answer