Question

distribua as equações
a) (×+2)•(x+4)
b) (x-4)•(x+3)
c) (x+6)•(x+5)
d) (x-7)•x

Answer 1

a)

$x \times x + 4x + 2x + 2 \times 4 \\ x {}^{2} + 4x + 2x + 8 \\ x {}^{2} + 6x + 8$

b)

$x \times x + 3x - 4x - 4 \times 3 \\ x {}^{2} + 3x - 4x - 12 \\ x {}^{2} - x - 12$

c)

$x \times x + 5x + 6x + 6 \times 5 \\ x {}^{2} + 5x + 6x + 30 \\ x {}^{2} + 11x + 30$

d)

$x \times x - 7x \\ x {}^{2} - 7x$