Simplify : 4(x+5) / x^2+2x-15
Firstly, remember to factorise!
x^2+2x-15 = (x+5)(x-3)
∴ the numerator and denominator now both share a common term "(x+5)", so they can cancel one another out, leaving the answer as :
4/(x-3)
SP
Related Maths GCSE answers
All answers ▸P has coordinates (3,4), Q has coordinate (a,b), a line perpendicular to PQ has equation 3x+2y=7. Find an expression for b in terms of a
Express 5/(2-sqrt(3)) in the form a + b*sqrt(3)
For what values of k does the line y=kx-1 have two distinct points of intersection with the circle (x-2)^2+(y-3)^2=2?
A is the point with coordinates (5, 9) B is the point with coordinates (d, 15) The gradient of the line AB is 3 Work out the value of d.