Question

Find the discriminant and describe the nature of the roots.
a. 3x^2+7x-10=0
b.5x^2-4x+8=0
c.36^2+22x+25=0
d.7x^2-2x-6=0

Answer 1

for ax2+bx+c = 0
discriminant=b^2 -4ac
a) D= 7^2 -4(3)(-10) =49+120=169(real positive perfect square nence roots are real unequal and rational)

Answer 2

ohhh, I get it now.. Thank you!

Answer 3

welcome...