Verified answer

1) ay⁴ - 16a = a(y⁴ - 16) = a(y² - 4)(y² + 4) = a(y - 2)(y + 2)(y² + 4)

2a) S = 6a²

a = 3x - 4

S = 6 * (3x - 4)² = 6 * (9x² - 24x + 16) = 54x² - 144x + 96

S =  54x² - 144x + 96

2b) V = a³

a = 3x - 4

V = (3x - 4)³ = (3x)³ - 3 * (3x)² * 4 + 3 * 3x * 4² - 4³ = 27x³ - 27x² + 144x - 64

V = 27x³ - 27x² + 144x - 64

3) 87² - 174 * 67 + 67² = 87² - 2 * 87 * 67 + 67² = (87 - 67)² = 20² = 400

4 задание не смогла сделать перевод