Question

solve by formula method 25 x square + 30 + 20 is equals to zero​

Answer 1

Answer:

[-6±√44(i)]/10

Step-by-step explanation:

25x^2+30x+20=0

5x^2+6x+4=0

using formula

x= [-6±√36-4(5)(4)]/2(5)

[-6±√44(i)]/10....where i is √-1

hope it helps u

Answer 2

x = $\sqrt{2}$ or -  $\sqrt{2}$

Step-by-step explanation:

Given, 25$x^{2}$ + 30 + 20 =0

⇒ 25$x^{2}$ + 50 = 0

⇒ 25($x^{2}$ + 2) = 0

⇒ $x^{2}$ + 2 = 0

⇒ $x^{2}$ + $x^{2} \sqrt{2}$ = 0

⇒ ( x + $\sqrt{2}$)( x - $\sqrt{2}$) = 0

∴ x = $\sqrt{2}$ or -  $\sqrt{2}$