Answer:
x=

Explanation:
Here is the correct question: Using the quadratic formula to solve
x²+4x - 7. what are the values of x.
Solving by using quadratic formula.
Formula:

∴ In the expression
, we have a= 1, b= 4 and c= -7.
Now, subtituting the value in the formula.
=

=

Opening parenthesis.
=

=

We know 2²=4
=
we know √a²=a
=
Taking 2 as common in the expression.
=

Cancelling 2
=

Hence we get,
