Question

Solve for x in the equation x squared + 2 x + 1 = 17

Answer 1

Two solutions x=-5.12 and x=3.12

Explanation:

x^2+2x+1=17

Subtract 17

so x^2+2x-16

Then solve using the quadratic formula

so x=
`(-2+or-√(2^2-4*1*(-16)))/(2*1)`

solve x=
`(-2+or-√(4+64) )/(2)`

Separate the equations into two x= equations of + or -

x=
`(-2+2√(17) )/(2)`

and x=
`(-2-2√(17) )/(2)`

x=-5.12

x=3.12