Question

Find the factors.

(11) 3x² + 3x − 1260

Answer 1

The factors of 3x² + 3x − 1260 are:

$$\begin{gathered} 3x^2+3x-1260 \\ =3\left[x^2+x-420\right] \\ =3\left[x^2+21x-20x-420\right] \\ =3\left[x\left(x+21\right)-20\left(x+21\right)\right] \\ =3\left(x+21\right)\left(x-20\right) \end{gathered}$$