Question

expression to be added in (5x^2-7x+2)to produce (7x^2-1)​

Answer 1

Answer:

required number is 2x² + 7x - 3

Step-by-step explanation:

5x² - 7x + 2 + x = 7x² - 1

x = 7x² - 1 -(5x² - 7x + 2)

x = 7x² - 1 - 5x² + 7x - 2

x = 2x² + 7x - 3