Question

factorise 3x^2+13x+4 ​

Answer 1

Answer:

3x^2 + 12x-x+4

3x (x+4) -1 (x+4)

Answer 2

Answer:

3x²+13x+4=0

Comparing the above equation with ax²+bx+c=0

a=3, b=13 and c=4

b²-4ac=(13) ²-4×3×4

=169-48

=121

Now, by formula method,

x=-b±√b²-4ac/2a

x=-13±√121/2×3

x=-13±11/6

x=-13+11/6 or -13-11/6

x=-2/6 or -24/6

x=-1/3 or -4