Question

the sum of the cube of a number and the product of the number and twelve is equal to seven times the square of the number. find the number.

Answer 1

4 or 3

Explanation:

X³+12X=7X²

X³-7X²+12X=0

X(X²-7X+12)=0

SOLVING THE QUADRATIC EQUATION

you have X=3 or X=4