Question

find the value of discriminant in 25x^2-30x+9

Answer 1

$25 {x}^{2} - 30x + 9$
Comparing with
$a {x}^{2} + bx + c$

Thus,
a=25 b = -30 and c = 9


Now,

$discriminant = {b}^{2} - 4ac \\ \\ = {( - 30)}^{2} + 4(25)(9) \\ \\ \\ = 900 + 900 \\ \\ = 1800$

Thus, the value of discriminant(∆) is 1800

Answer 2

Answer:

The answer to the question is given below step by step, i hope it helps :)

Step-by-step explanation:

D = $b^{2} - 4ac$

$a= 25, b= -30, c=9$

$D= b^{2} - 4ac\\ D= (-30)^{2} - 4(25)(9)$

the ' - ' when squared becomes '+' .

$D = 900 - 900$

$D = 0$