(x + y)² = x² + 2 (x)(y) + y²
= 9p² - 6p + 1
(6x – 5y)² = (6x)² - 2(6x)(5y) + (5y)²
(3p - 1)² = (3p)² - 2(3p)(1) + (1)²
= 36x² - 60xy + 25y²
= 9a² - 30ab + 25b²
= x² + 2xy + y²
(2p + q)² = (2p)² + 2(2p)(q) + q²
1. (2 + x)² = 2² + 2(2)(x) + x²
(9x2 – 7y2)² = (9x²)² - 2(9x²)(7y²) + (7y²)²
(8a2b + 7ab6y²)² = (8a²b)² + 2(8a²b)(7ab6y²) + (7ab6y²)²
= 64a4b² + 112a3b7y² + 49a²b12y4
= 4 + 4x + x²
2. (3a – 5b)² = (3a)² - 2(3a)(5b) + (5b)²
= 4p² + 4pq + q²
= 81x4 - 126 x²y² + 49y4
