First set into standard form:
x^2-7x+8 = 0
the discriminant is b^2-4ac = 49-32=17
Now you try and plug that into the formula. After all, I know how to do it -- you need the practice
Use the quadratic formula to solve the equation -x^2 + 7x = 8
3 answers
x^2 - 7 x = -8
or
1 x^2 - 7 x + 8 = 0
x = [ 7 +/- sqrt(49 - 32) ] /2
x = [ 7 +/- sqrt(17) ]/2
x = 1.44 or 5.56
or
1 x^2 - 7 x + 8 = 0
x = [ 7 +/- sqrt(49 - 32) ] /2
x = [ 7 +/- sqrt(17) ]/2
x = 1.44 or 5.56
Thank you so much both of you! Do you think you could help me out with any more?
0 answers