Question

If x + y = 12 and x - y = 6 then, the value of x² - y²?​

Answer 1

x² - y² = 72

Explanation:

x² - y² ← is a difference of squares and factors as

(x + y)(x - y)

substitute x + y = 12 and x - y = 6 into the expression

= 12 × 6

= 72