D=a2-a1=10-6=4
a11=a1+10d=6+10*4=46
(n² + 1)² = (n²)² + 2 * n² * 1 + 1² = n⁴ + 2n² + 1
(x⁴ - x²)² = (x⁴)² - 2 * x⁴ * x² + (x²)² = x⁸ - 2x⁶ + x⁴
(y⁴ + y³)² = (y⁴)² + 2 * y⁴ * y³ + (y³)² = y⁸ + 2y⁷ + y⁶
(- 3a + 4b³)² = (4b³ - 3a)² = (4b³)² - 2 * 4b³ * 3a + (3a)² = 16b⁶ - 24ab³ + 9a²
1. (6y^2-7y-3)+2y^2-50=2-8y+8y^2+6y
8y^2-7y-53=2-2y+8y^2
5y=-55
y=-11