3) Subtract (3x2 + 7x-9) from (8x2 - 4x + 1).

5x² - 11x + 10

Step-by-step explanation:

(8x² - 4x + 1) - (3x² + 7x - 9) =

8x² - 4x + 1 - 3x² - 7x + 9 =

5x² - 11x + 10

Hey there!

It's given to subtract (3x² + 7x - 9) from (8x² - 4x + 1). So ⇨

(8x² - 4x + 1) - (3x² + 7x - 9)

= 8x² - 4x + 1 - 3x² - 7x + 9

= 8x² - 3x² - 4x - 7x + 1 + 9

= 5x² - 11x + 10

Hope it helps ya!

Sample Response: Because vertical angles are congruent, angles 1 and 4 are congruent. Because corresponding angles are congruent, angles 4 and 8 are congruent. Because angle 4 is congruent to both 1 and 8, angle 1 is congruent to angle 8.