Select the correct answer. Which expression is equivalent to the given polynomial expression? (-4a2 â€"" 3b) + (-2ab -a2 +b2) + (-b2+ 6ab)

OA.-3a2 +2b2 + 8ab + 3b
OB.-3a2 + 4ab + 3b
O c. -5a2 + 4ab - 3b
D.-5a2 + 2b2 + 8ab + 3b​

b. 2 and 4

step-by-step explanation:

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²