Question:
Factorise:
x2 + x − 132Factorise:
x2 + x − 132
Solution:
The given expression is $x^{2}+x-132$.
Find two numbers that follow the conditions given below:
Sum $=1$
Product $=-132$
Clearly, the numbers are 12 and $-11$.
$x^{2}+x-132=x^{2}+12 x-11 x-132$
$=x(x+12)-11(x+12)$
$=(x+12)(x-11)$