Question

Solve 9x2 + 12x + 4 = 0. By using the quadratic formula

Answer 1

`Discriminant= b^(2)-4.a.c \\ \\ We\:need\:to:-b+ √(discriminant) /2a \\ \\ 9x^(2) +12x+4=0 \\ => 12^(2) -4.9.4 \\ 144-144=0 \\ √(0) =0 \\ \\ -12+ 0/18= (-12)/(18) = (-2)/(3) \\ \\ That`s\: enough=>x= (-2)/(3) \\ \\ \framebox[1.1\width]{Good Luck!} \par`

Answer 2

so 9x^2+12x+4=0

so the quadratic formulat is (-b+/-(squrt(b^2-4ac)))/(2a)=x
subsitute
ax^2+bx+c=

9=a
12=b
4=c

(-12+/-(squrt(12^2-4(9)(4))))/(2(9))=x
(-12+/-(squrt(144^2-144)))/18)=x

(-12+/-0)/18)=x
-12/18=x
-2/3=x