Question

if x²+2x=5 then b²-4ac equal to what????​

Answer 1

Answer:

Step-by-step explanation:

x^2 + 2x = 5

x^2 + 2x - 5 = 0

⇒a = 1               b = 2             c = -5

b^2 - 4ac = (2)^2 - 4(1)(-5)

                = 4 + 20

                = 24

Answer 2

Here in the polynomial :

${x}^{2} + 2x = 5$

$\implies \: {x}^{2} + 2x - 5 = 0$

a = coefficient of ${x}^{2}$ = 1

b = coeff of x = 2

C= variable = -5

So,

${b}^{2} - 4ac = {2}^{2} - 4(1)( - 5)$

$\implies \: 4 + 20$

$\implies \: 24$