evaluate the expression

Mathematics
Tutor: None Selected Time limit: 1 Day

evaluate the expression when x= -2, y= 2/3, z=4, w= -1/2

exercise 1. y(x-4)     exercise 2. z^2 - x+6

evaluate the expression when a=12, b= -3, and c= -2

exercise 1. bc / a          exercise 2. b^2 - c^2

Oct 8th, 2014

1. y(x-4)= 2/3(-2-4) = 2/3*-6 = 2*-2 = -4

2. z^2-x+6= 4^2-(-2)+6 = 16+2+6 = 24

1. bc/a= -3*-2/12= 6/12=1/2

2. b^2-c^2 = (b-c)(b+c) = (-3-(-2))(-3+(-2)) = (-3+2)(-3-2)= -1*-5 = 5

Oct 8th, 2014

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