Step-by-step explanation:
The product of the sum of a and b and their difference:
(a + b)(a - b) = a² - b²
Proof:
L = (a + b)(a - b) <em>use FOIL</em>
L = (a)(a) + (a)(-b) + (b)(a) + (b)(-b)
L = a² - ab + ab - b² <em>combine like terms</em>
L = a² - b² + (-ab + ab)
L = a² - b²
R = a² - b²
L = R
Answer:
C. x – 7
E. x + 2
Answer:B
34
4x7 divided by 9
I think it's D.)
