Question

find roots of x2 + 3x - 4 using formula method.
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Answer 1

Answer:

The roots of the equation are 1 and -4.

Step-by-step explanation:

x^2+3x-4=0

a=1,b=3 and c = -4

By formula method,

-b±√b^2-4ac/2a

First root will be

-3+√(3)^2-4(1)(-4)/2(1)

= -3+√9+16/2

= -3+√25/2

= -3+5/2

= 2/2

=1

Second root will be

-3-√(3)^2-4(1)(-4)/2(1)

= -3-√9+16/2

= -3-√25/2

= -3-5/2

= -8/2

= -4

The roots of the equation are 1 and -4.