The functions f and g are such that f(x)=5x+2 and g(x)=-x-4. a) Find fg(x). b) Find ff(x). c) Solve fg(x) = ff(x).
a) fg(X) = 5(-x-4)+2 = -5x-20+2 = -5x-18b) ff(X) = 5(5x+2)+2 = 25x+10+2 =25x+12c) 25x+12=-5x-18 25x+5x=-18-12 30x=-30 x=-1
MA
Related Maths GCSE answers
All answers ▸√ 5(√ 8 + √ 2) Can be written as "a√ 10". What is the value of a?
A right angled triangle has sides of length 3 and length 4, what is the length of the hypotenuse?
Work out the solutions to the following quadratic equation: x² + 7x + 10 = 0 by factorising.
Solve the equation: x^2+7x=-12