Question

a) (a + 5)²
b) (a + 3)²
c) (5 + 3x)²
d) (2x + y)²​

Answer 1

Resposta:

A-

${(a + 5)}^{2} = {a}^{2} + 5a + 5a + 25 = \\ {a}^{2} + 10a + 25$

B-

${(a + 3)}^{2} = {a}^{2} + 3a + 3a + 9 = \\ {a}^{2} + 6a + 9$

C-

${(5 + 3x)}^{2} = 25 + 15x + 15x + {9x}^{2} = \\ 25 + 30x + {9x}^{2}$

D-

${(2x + y)}^{2} = {4x}^{2} + 2xy + 2xy + {y}^{2} = \\ {4x}^{2} + 4xy + {y}^{2}$