Answered

How many real roots does the quadratic equation x² + 5x + 7 =0 have?
A. 0 B. 1 C. 2 D. 3

Sagot :

Cheahjimmyviz
the nature of the roots of a quadratic equation is determined by the
discriminant        ^      b² - 4ac
x²+ 5x+7= 0      ^  the discriminant is       5²- (4 .1 .7) =  -3
if b²-4ac < 0   ^     the roots are imaginary
so the answer is     A. 0