First of all, let's put the second grade equation under the general form:
a*x^2+b*x+c=0, where a,b,c, are the quotients and x is the variable, or unknown.
Let's identify the quotients of our equation:
a=2, b=-9, c=-5
Now, we cand use the formula for finding the two solution of the equation:
x1=[-b+sqrt(b^2-4*a*c)]/2*a
By substituting the quotients with ours:
x1=[-(-9)+sqrt(81+40)]/2*2
x1=(9+11)/4=20/4=5
x2=[-b-sqrt(b^2-4*a*c)]/2*a
x2=(9-11)/4=-2/4=-1/2
No comments:
Post a Comment