Question

Solve by formula method given X2 + 3X – 28 = 0

Answer 1

Step-by-step explanation:

Solution: x²+3x-28=0 ...(1) ...

D = b² - 4ac. then its roots are.

x = ( -b ± √D )/2a. Comparing equations (1) and (2) we get. ...

Now finding its Discriminant :- D = b² - 4ac. ...

Now finding roots of the given equation by quadratic formula :- x = ( -3 + √121 )/ 2×1. ...

And. x = ( -3 - √121 )/ 2×1.

Answer 2

Answer:

x=4 ; x=-7

Step-by-step explanation:

x²+3x-28=0

Using quadratic formula,

x= (-3 ± √(3²-4×1×(-28)) / (2×1)

On simplification,

x=(-3 ± 11)/2

Separate the equations,

x=(-3+11)/2 ; x=(-3-11)/2

x=4 ; x=-7

Hope it helps you...

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