Question

1- Efetue: a) ( x + 7 )² b) ( 5 + 2m )² c) ( a + 3x )² d) ( 5x² + 1 )² e) ( m - 3 )² f) ( 2a - 5 )² g) ( 2 - x³ )²

Answer 1

Resposta:

$a)(x + 7)(x + 7) = x {}^{2} + 2 \times 7x + 7 {}^{2} \\ x {}^{2} + 14x + 49$