First of all multiply constant term and coefficient of x2 that is 1 so 1 * 1 = 1 2 1 (1 * 1)
STEP-2
Now split the coefficient of x that is 2 in two part so that their multiplication equals to 1 and their addition equals to 2 so 1 * 1 = 1 ( Constant Term ) 1 + 1 = 2 ( Coefficient of middile term )
STEP-3
so the factor will be- ( x + 1) ( x + 1)
If we have to calulate zeros then-
x + 1 = 0 or x + 1 = 0
x = - 1 or x = - 1
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