Question

type the correct answer in each box. consider the expressions shown below. a: -9x² - 2x + 7, b: 9x² - 2x + 2, c: 9x² + 2x - 7. complete the following statements with the letter that represents the expression. (7x² - 5x + 3) + (2x² + 3x - 1) is equivalent to expression box. (3x² - 4x - 4) + (-12x² + 2x + 11) is equivalent to expression box. (4x² - 3x - 9) + (5x² + 5x + 2) is equivalent to expression box.

Explanation:

Step1: Simplify first expression

$(7x^2 -5x +3)+(2x^2 +3x -1)=(7x^2+2x^2)+(-5x+3x)+(3-1)=9x^2-2x+2$ (matches B)

Step2: Simplify second expression

$(3x^2 -4x -4)+(-12x^2 +2x +11)=(3x^2-12x^2)+(-4x+2x)+(-4+11)=-9x^2-2x+7$ (matches A)

Step3: Simplify third expression

$(4x^2 -3x -9)+(5x^2 +5x +2)=(4x^2+5x^2)+(-3x+5x)+(-9+2)=9x^2+2x-7$ (matches C)

Answer:

B
A
C