# How do you solve #m^2+1.8m-1.5=0# by completing the square?

##### 1 Answer

Aug 19, 2017

**and**

#### Explanation:

First:

Put m + (half of 1.8) in a bracket and square them

This expands to *almost* what we started with - only the c value, 0.81, is wrong. We want it to be -1.5, so we adjust for this by subtracting 0.81 **and** 1.5

This makes it

Now move the -2.31 to the other side

Square root both sides

Move the 0.9 to rhs