SOLUTION: Determine whether the following equations have a solution or not and justify your answer. 1. 5x² + 8x+7 =0 2. 7½y²-6y-13(7)½=0 3. 2x²+x-1 = 0 4. 4/3x²-2x+3/4 =0 5. 2x²+5x+5=

Algebra ->  Equations -> SOLUTION: Determine whether the following equations have a solution or not and justify your answer. 1. 5x² + 8x+7 =0 2. 7½y²-6y-13(7)½=0 3. 2x²+x-1 = 0 4. 4/3x²-2x+3/4 =0 5. 2x²+5x+5=      Log On


   

Question 113332: Determine whether the following equations have a solution or not and justify your answer.
1. 5x² + 8x+7 =0
2. 7½y²-6y-13(7)½=0
3. 2x²+x-1 = 0
4. 4/3x²-2x+3/4 =0
5. 2x²+5x+5=0
6. p²-4p+4 =0
7. m²+m+1=0
8. 3z²+z-1 =0
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
ALL QUADRATIC EQUATIONS HAVE SOLUTIONS.
SOME READILY FACTORED WHILE SOME NEED THE QUADRATIC EQUATION
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
TO SOLVE.
5X^2+8X+7=0
X=(-8+-SQRT8^2-4*5*7])/2*5
X=(-8+-SQRT64-140])/10
X=(-8+-SQRT-76)/10
X=(-8+-8.7i)/10
X=-.8+.87i ANSWER.
X=(-8-8.71i)/10
X=--.8-.87i ANSWER.