Sabendo que x . y =8 e x . z = -2, determine:
a)x . (y + z) b) x . (y - z) c)x . y . x . z d) x . (y + z) + x . (y - z)
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xy = 8
xz = -2
a
x ( y + z ) = xy + xz = 8 * ( -2) = -16 ****
b
x ( y - z) = xy - xz = 8 - ( -2) = 8 + 2 = 10 ****
c
x * y * x * z = xy * xz = 8 * ( -2) = - 16 ***
d
x ( y + z) + x ( y - z )
xy + xz + xy - xz = 2xy ou 2 ( 8 ) = 16 ****
xz = -2
a
x ( y + z ) = xy + xz = 8 * ( -2) = -16 ****
b
x ( y - z) = xy - xz = 8 - ( -2) = 8 + 2 = 10 ****
c
x * y * x * z = xy * xz = 8 * ( -2) = - 16 ***
d
x ( y + z) + x ( y - z )
xy + xz + xy - xz = 2xy ou 2 ( 8 ) = 16 ****
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