1.

solve using formula x2 _ 7x + 12 = 0

Answer»

According toquadratic formulaifax^2+bx+c=0, thenx=−b±√b^2−4ac/2a

Here we havex^2−7x+12i.e.a=1,b=−7andc=12

andx=−(−7)±√(−7)^2−4⋅1⋅12/2⋅1

=7±√49−48/2

=7±√1/2

=7±1/2

i.e.x=4or3


Discussion

No Comment Found

Related InterviewSolutions