Question

X square + 4 x minus 1 is equal to zero using formula method

Answer 1

Answer:

-b±√b2-4ac/2a this is the formula

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

substituting all the values in the formula,

-4±√4×4-4(1×-1)/2×1

-4±√16+4/2

-4±√20/2