3x²+8x+4 how to solve this

In this type of equation you could use different methods. But I choose to do Quadratic Method.

a= 3, b= 8, and c= 4.

X= -(8)+_SQUARE ROOT (8)^2-4(3)(4)/2(3)

X= -8+_SQUARE ROOT16/6 Square Root of 16 is 4

X= -8+_4/6

X=  -8+4/6= -4/6= -2/3.

X= -8-4/6= -12/6= -2.

Answer is: -2/3 and -2.

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

1,150 give brainliest

step-by-step explanation

2r= 2300

r =1150