Question

if the discriminant of the quadratic equation 4x2+dx+25=0 is zero then find d​

Answer 1

Answer:

±20

Step-by-step explanation:

d^2 =b^2-4ac using this formula we get the answer

b- second term in the equation

a-first term

c-constant

Answer 2

Answer:

d = +20     d = -20

Step-by-step explanation:

d = b² - 4ac = 0

0 = d² - 4(4)(25)

0 = d² - 400

d² = 400

d = +20     d = -20