Simplify (4x^2 - 8xy + 2y^2) - (9x^2 - 4xy - 7y^2) a. -5x^2 + 4xy + 9y^2 b. -5x^2 - 4xy + 9y^2 c. -5x^2 + 12xy + 4y^2 d. -5x^2 - 4xy - 5y^2

b

Step-by-step explanation:

Distribute parenthesis and collect like terms, noting that the second parenthesis is distributed by - 1

(4x² - 8xy +2y²) - (9x² - 4xy - 7y²)

= 4x² - 8xy + 2y² - 9x² + 4xy + 7y² ← collect like terms

= (4x² - 9x²) + (- 8xy + 4xy) + (2y² + 7y²)

= - 5x² - 4xy + 9y² → b

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides

mrbilldoesmath!

answer: a parabola

steps:

(x-1)(x+4)   = x(x+4) - 1(x+4) = (x^2 + 4x) - (x+4)

                = x^2 +4x -x -4   = x^2 +3x -4

which is a parabola

mrb