Question

(c-3)(c+3)
(y+7)(y-7)
(x²+2)(x²-2)
(4-y²)(4+y²)​

Answer 1

Explicație pas cu pas:

(c - 3)(c + 3)

Cc + 3C - 3c - 3 × 3

Cc + 3C - 3c - 9

(y + 7)(y - 7)

y² - 7²

y² - 49

(x² + 2)(x² - 2)

(x²)² - 2²

x⁴ - 4

(4 - y²)(4 + y²)

4² - (y²)²

16 - y⁴