Question

b) ( x + 2 )² =
c) ( 4x + 9 )² =

Answer 1

b) (x + 2)²

(x + 2) × (x + 2)

x × x + 2x + 2x + 2 × 2

x² + 2x + 2x + 4

x² + 4x + 4

c) (4x + 9)²

(4x + 9) × (4x + 9)

4x × 4x + 4x × 9 + 9 × 4x + 9 × 9

16x² + 36x + 36x + 81

16x² + 72x + 81