If f(x) = x^2 - x + 7, find f(3)

f (3) = (3)2 - (3) + 7
= 9 - 3 + 7
= 13

SJ

Related Maths GCSE answers

All answers ▸

ABC is an acute-angled triangle. BA=7cm and BC=8cm. The area of triangle ABC is 18 cm^2 . Work out the size of angle BAC. Give your answer correct to 3 significant figures. You must show all your working.


Expand the brackets (x-3)(x+4)


Show that the function f(x) = x^2 + 2x + 2 is always positive for real values of x


Solve the simultaneous equations: 5x + y = 21, x - 3y = 9