Tessa made a mistake solving the equation 4(2x + 3 ) = -20. select the line in which her mistake appears.
line 1. 4 (2x + 3) = -20
line 2. 8x + 12 = -20
line 3. 8x = -8
line 4. x = -1

Line 3

Step-by-step explanation:

we have

Verify each line

Line 1

----> the given equation

Line 1 is correct

Line 2

Distribute in the left side

Line 2 is correct

Line 3

Subtract 12 both sides

The line 3 is not correct

- 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

anser is a

step-by-step explanation:

negitive slope