Question

1. Which is equivalent to the expression below? (3.x2 – 2x + 5) - (2x2 – 5x + 1)

Answer 1

Answer:

x^2   + 3x    + 4

Step-by-step explanation:

(3.x2 – 2x + 5) - (2x2 – 5x + 1)    Combine like terms:  x^2, x and constants:

3x^2 - 2x^2  -2x + 5x  + 5 - 1

This condenses to

     x^2   + 3x    + 4

Answer 2

Answer:

x = 6

x = 1

Step-by-step explanation:

(3x² - 2x + 5) - (2x² - 5x + 1)

= 3x² - 2x² - 2x - 5x + 5 + 1

= x² - 7x + 6

= (x - 6)(x - 1)

x - 6 = 0

x = 6

x - 1 = 0

x = 1