Question

find the discriminant of the quadratic equation 9x²+7x_2=0?

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Answer 1

Answer:

Solution : The given equation is 9x2+7x-2=0. ∴ D=(b2-4ac)=(72-4×9×(-2)]=121>0. So, the given equation has real roots.

Answer 2

Step-by-step explanation:

a=9,

b=7,

c= –2

using the formula, we get

B²–4(a)(c)

(7)²–4(9)(2)

49–72

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