Question

Solve for x in the equation x2 + 2x + 1 = 17.

x=-11 15
X=-1+ V17
X=-2+25
X=-1V13

Answer 1

Answer:X=-1+ V17

Explanation:

X^2+2x +1 =17

Write down the equation in the form of ax^2+bx +c=0, by taking 17 to the LHS

X^2 +2x +1 -17=0

X^2+2x-16=0

Using formulae method.

X= -b^2 + (√b^2-4ac)/2a

b=2, a=1 and c=-16

Slot in your values

You will have

X=-1+ V17