write (x+2)(x+3)(x+5) in the form ax^3+bx^2+cx+d

First take (x+2)(x+3) and expand to get x2 +3x+2x+6, which can be simplified to equal x2+5x+6.Then mutiple x2+5x+6 by (x+5). This will give you x3+5x2+5x2+25x+6x+30. Simplify this to equal x3+10x2+31x+30.

CH

Related Maths GCSE answers

All answers ▸

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.


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


If 4x + 3y = 4 and x + 2y = 2 what are the values of x and y ?


Triangle ABC has perimeter 20 cm. AB = 7 cm. BC = 4 cm. By calculation, deduce whether triangle ABC is a right-angled triangle. 4 marks.