ANSWER
x=1.1 or x=-9.1
Step-by-step explanation

Ad the square of half the coefficient of x to both sides:


The left hand side is now a perfect square.

Take square root


x=1.1 or x=-9.1
Using the quadratic formula, we need to rewrite the given equation to get;

where a=1, b=8 and c=-10
The solution is given by:

We substitute the values into the formula to get;




x=1.1 or x=-9.1
to the nearest tenth.