Question

1) Calcule o quadrado da soma:
a) (x+2)²
b) (3a+5)²
c) (x+3)²
d) (2y+x)²

Desde já,agradeço!!!

Answer 1

a
( x + 2)² 
[(x)² + 2 . x . 2 + (2)² ] =
x² + 4x + 4 ***
b
( 3a + 5)² =
[ (3a)² + 2.3a.5 + (5)² ]
9a² + 30a + 25 ***
c
( x + 3)² 
(x)² + 2 . 3 . x + (3)² =
x² + 6x + 9 ***
d
( 2y + x)²
[ (2y)² + 2 . 2y.x + ( x)²]
4y² + 4xy + x² ****