Question

Efetue. a) (5x+1)^2 b) (2y-1)^2

Answer 1

$a)(5x + 1)^{2} = {(5x)}^{2} + 2.(5x).1 + {1}^{2} = 25 {x}^{2} + 10x + 1 \\ \\ b)(2y - 1)^{2} = {(2y)}^{2} - 2.2y.1 + {1}^{2} = 4 {y}^{2} - 4y + 1$

Answer 2

a) (5x+1)²

    ( 5x)² + 2.5.1 + 1²

     25x² + 10 + 1

b) (2y-1)²

   ( 2y )² - 2.2.1 + (-1)²

     4y² - 4 + 1