Question

7. Find the roots of x3-7x+10 =0 by using quadratic formula ​

Answer 1

x^2-7x+10=0

it is in the form of ax^2+bx+c=0

a=1,b=-7,c=10

x=-b+_√b^2-4ac

2a

=-(-7)+_√(-7)^2-4(1)(10)

2(1)

=7+_√49-40

2

=7+_√9

2

=7+_3

2

X=7+3 X=7-3

2 2

X=10 X=4

2 2

X=5. X=2.

5and2 are the roots of the quadratic equation

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