Factorise: x^2 +3x - 1
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Answer:
(x+2)(x+1)
Step-by-step explanation:
Let a =1, b=3 and c=-1
-b+-√b^2+4ac/2a
-3+-√9-4/2
-3+-3-2/2
-3+-1/2
-3-1/2
-4/2
-2/1=x
-3+1/2
-2/2
-1/1=x
Roots of the equation=(x+2)(x+1)